Home / 13,125.47-18,114.70-8,287.22

Finding the Fourth Proportional to 13,125.47, 18,114.70 and 8,287.22

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Solution

The fourth proportional to 13,125.47, 18,114.70 and 8,287.22 is: 11,437.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.47 : 18,114.70 = 8,287.22 : x
  2. Step 2: Convert to fraction form
    13,125.47/18,114.70 = 8,287.22/x
  3. Step 3: Cross multiply
    13,125.47x = 18,114.70 × 8,287.22
  4. Step 4: Simplify right side
    13,125.47x = 150,120,567.55
  5. Step 5: Solve for x
    x = 150,120,567.55/13,125.47
  6. Step 6: Final answer
    x = 11,437.35

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Half scale
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Double scale
Find fourth proportional to 13,126.47, 18,116.08 and 8,288.22
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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.