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Finding the Fourth Proportional to 15,611.10, 21,543.31 and 8,537.53

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Solution

The fourth proportional to 15,611.10, 21,543.31 and 8,537.53 is: 11,781.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,611.10 : 21,543.31 = 8,537.53 : x
  2. Step 2: Convert to fraction form
    15,611.10/21,543.31 = 8,537.53/x
  3. Step 3: Cross multiply
    15,611.10x = 21,543.31 × 8,537.53
  4. Step 4: Simplify right side
    15,611.10x = 183,926,655.42
  5. Step 5: Solve for x
    x = 183,926,655.42/15,611.10
  6. Step 6: Final answer
    x = 11,781.79

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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.