Home / 10,729.20-16,132.20-9,039.60

Finding the Fourth Proportional to 10,729.20, 16,132.20 and 9,039.60

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Solution

The fourth proportional to 10,729.20, 16,132.20 and 9,039.60 is: 13,591.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,729.20 : 16,132.20 = 9,039.60 : x
  2. Step 2: Convert to fraction form
    10,729.20/16,132.20 = 9,039.60/x
  3. Step 3: Cross multiply
    10,729.20x = 16,132.20 × 9,039.60
  4. Step 4: Simplify right side
    10,729.20x = 145,828,635.12
  5. Step 5: Solve for x
    x = 145,828,635.12/10,729.20
  6. Step 6: Final answer
    x = 13,591.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.