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Finding the Fourth Proportional to 15,776.90, 21,772.62 and 9,063.87

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Solution

The fourth proportional to 15,776.90, 21,772.62 and 9,063.87 is: 12,508.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,776.90 : 21,772.62 = 9,063.87 : x
  2. Step 2: Convert to fraction form
    15,776.90/21,772.62 = 9,063.87/x
  3. Step 3: Cross multiply
    15,776.90x = 21,772.62 × 9,063.87
  4. Step 4: Simplify right side
    15,776.90x = 197,344,324.79
  5. Step 5: Solve for x
    x = 197,344,324.79/15,776.90
  6. Step 6: Final answer
    x = 12,508.43

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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.