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Finding the Fourth Proportional to 15,471, 21,349.98 and 8,397.47

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Solution

The fourth proportional to 15,471, 21,349.98 and 8,397.47 is: 11,588.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,471 : 21,349.98 = 8,397.47 : x
  2. Step 2: Convert to fraction form
    15,471/21,349.98 = 8,397.47/x
  3. Step 3: Cross multiply
    15,471x = 21,349.98 × 8,397.47
  4. Step 4: Simplify right side
    15,471x = 179,285,869.93
  5. Step 5: Solve for x
    x = 179,285,869.93/15,471
  6. Step 6: Final answer
    x = 11,588.51

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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.