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Finding the Fourth Proportional to 10,660.68, 15,966.72 and 8,710.20

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Solution

The fourth proportional to 10,660.68, 15,966.72 and 8,710.20 is: 13,045.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,660.68 : 15,966.72 = 8,710.20 : x
  2. Step 2: Convert to fraction form
    10,660.68/15,966.72 = 8,710.20/x
  3. Step 3: Cross multiply
    10,660.68x = 15,966.72 × 8,710.20
  4. Step 4: Simplify right side
    10,660.68x = 139,073,324.54
  5. Step 5: Solve for x
    x = 139,073,324.54/10,660.68
  6. Step 6: Final answer
    x = 13,045.45

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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.