Home / 15,697.28-21,655.98-8,981.60

Finding the Fourth Proportional to 15,697.28, 21,655.98 and 8,981.60

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Solution

The fourth proportional to 15,697.28, 21,655.98 and 8,981.60 is: 12,391.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,697.28 : 21,655.98 = 8,981.60 : x
  2. Step 2: Convert to fraction form
    15,697.28/21,655.98 = 8,981.60/x
  3. Step 3: Cross multiply
    15,697.28x = 21,655.98 × 8,981.60
  4. Step 4: Simplify right side
    15,697.28x = 194,505,349.97
  5. Step 5: Solve for x
    x = 194,505,349.97/15,697.28
  6. Step 6: Final answer
    x = 12,391.02

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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.