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Finding the Fourth Proportional to 15,611, 21,543.18 and 8,537.48

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Solution

The fourth proportional to 15,611, 21,543.18 and 8,537.48 is: 11,781.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,611 : 21,543.18 = 8,537.48 : x
  2. Step 2: Convert to fraction form
    15,611/21,543.18 = 8,537.48/x
  3. Step 3: Cross multiply
    15,611x = 21,543.18 × 8,537.48
  4. Step 4: Simplify right side
    15,611x = 183,924,468.39
  5. Step 5: Solve for x
    x = 183,924,468.39/15,611
  6. Step 6: Final answer
    x = 11,781.72

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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.