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Finding the Fourth Proportional to 15,472.35, 21,352.01 and 8,398.89

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Solution

The fourth proportional to 15,472.35, 21,352.01 and 8,398.89 is: 11,590.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,472.35 : 21,352.01 = 8,398.89 : x
  2. Step 2: Convert to fraction form
    15,472.35/21,352.01 = 8,398.89/x
  3. Step 3: Cross multiply
    15,472.35x = 21,352.01 × 8,398.89
  4. Step 4: Simplify right side
    15,472.35x = 179,333,141.27
  5. Step 5: Solve for x
    x = 179,333,141.27/15,472.35
  6. Step 6: Final answer
    x = 11,590.56

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1.5x scale

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.