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Finding the Fourth Proportional to 10,606.80, 15,872.40 and 9,235.20

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Solution

The fourth proportional to 10,606.80, 15,872.40 and 9,235.20 is: 13,819.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,606.80 : 15,872.40 = 9,235.20 : x
  2. Step 2: Convert to fraction form
    10,606.80/15,872.40 = 9,235.20/x
  3. Step 3: Cross multiply
    10,606.80x = 15,872.40 × 9,235.20
  4. Step 4: Simplify right side
    10,606.80x = 146,584,788.48
  5. Step 5: Solve for x
    x = 146,584,788.48/10,606.80
  6. Step 6: Final answer
    x = 13,819.89

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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.