Home / 13,436.05-18,543.26-8,130.76

Finding the Fourth Proportional to 13,436.05, 18,543.26 and 8,130.76

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Solution

The fourth proportional to 13,436.05, 18,543.26 and 8,130.76 is: 11,221.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,436.05 : 18,543.26 = 8,130.76 : x
  2. Step 2: Convert to fraction form
    13,436.05/18,543.26 = 8,130.76/x
  3. Step 3: Cross multiply
    13,436.05x = 18,543.26 × 8,130.76
  4. Step 4: Simplify right side
    13,436.05x = 150,770,796.68
  5. Step 5: Solve for x
    x = 150,770,796.68/13,436.05
  6. Step 6: Final answer
    x = 11,221.36

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Find fourth proportional to 6,718.03, 9,271.63 and 4,065.38
Half scale
Find fourth proportional to 26,872.10, 37,086.52 and 16,261.52
Double scale
Find fourth proportional to 13,437.05, 18,544.64 and 8,131.76
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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.