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Finding the Fourth Proportional to 15,502.08, 21,393.78 and 8,787.99

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Solution

The fourth proportional to 15,502.08, 21,393.78 and 8,787.99 is: 12,127.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,502.08 : 21,393.78 = 8,787.99 : x
  2. Step 2: Convert to fraction form
    15,502.08/21,393.78 = 8,787.99/x
  3. Step 3: Cross multiply
    15,502.08x = 21,393.78 × 8,787.99
  4. Step 4: Simplify right side
    15,502.08x = 188,008,324.70
  5. Step 5: Solve for x
    x = 188,008,324.70/15,502.08
  6. Step 6: Final answer
    x = 12,127.94

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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.