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Finding the Fourth Proportional to 15,325, 21,148.50 and 9,355.72

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Solution

The fourth proportional to 15,325, 21,148.50 and 9,355.72 is: 12,910.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,325 : 21,148.50 = 9,355.72 : x
  2. Step 2: Convert to fraction form
    15,325/21,148.50 = 9,355.72/x
  3. Step 3: Cross multiply
    15,325x = 21,148.50 × 9,355.72
  4. Step 4: Simplify right side
    15,325x = 197,859,444.42
  5. Step 5: Solve for x
    x = 197,859,444.42/15,325
  6. Step 6: Final answer
    x = 12,910.89

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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.