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Finding the Fourth Proportional to 15,149.76, 20,901.12 and 9,177.12

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Solution

The fourth proportional to 15,149.76, 20,901.12 and 9,177.12 is: 12,661.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,149.76 : 20,901.12 = 9,177.12 : x
  2. Step 2: Convert to fraction form
    15,149.76/20,901.12 = 9,177.12/x
  3. Step 3: Cross multiply
    15,149.76x = 20,901.12 × 9,177.12
  4. Step 4: Simplify right side
    15,149.76x = 191,812,086.37
  5. Step 5: Solve for x
    x = 191,812,086.37/15,149.76
  6. Step 6: Final answer
    x = 12,661.06

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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.