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Finding the Fourth Proportional to 10,308, 15,490.80 and 9,644.16

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Solution

The fourth proportional to 10,308, 15,490.80 and 9,644.16 is: 14,493.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,308 : 15,490.80 = 9,644.16 : x
  2. Step 2: Convert to fraction form
    10,308/15,490.80 = 9,644.16/x
  3. Step 3: Cross multiply
    10,308x = 15,490.80 × 9,644.16
  4. Step 4: Simplify right side
    10,308x = 149,395,753.73
  5. Step 5: Solve for x
    x = 149,395,753.73/10,308
  6. Step 6: Final answer
    x = 14,493.19

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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.