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Finding the Fourth Proportional to 10,663.60, 15,966.60 and 8,359.60

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Solution

The fourth proportional to 10,663.60, 15,966.60 and 8,359.60 is: 12,516.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,663.60 : 15,966.60 = 8,359.60 : x
  2. Step 2: Convert to fraction form
    10,663.60/15,966.60 = 8,359.60/x
  3. Step 3: Cross multiply
    10,663.60x = 15,966.60 × 8,359.60
  4. Step 4: Simplify right side
    10,663.60x = 133,474,389.36
  5. Step 5: Solve for x
    x = 133,474,389.36/10,663.60
  6. Step 6: Final answer
    x = 12,516.82

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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.