Home / 13,290.75-18,341.24-8,322.75

Finding the Fourth Proportional to 13,290.75, 18,341.24 and 8,322.75

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Solution

The fourth proportional to 13,290.75, 18,341.24 and 8,322.75 is: 11,485.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.75 : 18,341.24 = 8,322.75 : x
  2. Step 2: Convert to fraction form
    13,290.75/18,341.24 = 8,322.75/x
  3. Step 3: Cross multiply
    13,290.75x = 18,341.24 × 8,322.75
  4. Step 4: Simplify right side
    13,290.75x = 152,649,513.60
  5. Step 5: Solve for x
    x = 152,649,513.60/13,290.75
  6. Step 6: Final answer
    x = 11,485.40

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Find fourth proportional to 6,645.38, 9,170.62 and 4,161.38
Half scale
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Double scale
Find fourth proportional to 13,291.75, 18,342.62 and 8,323.75
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.