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Finding the Fourth Proportional to 10,971, 16,458.88 and 5,124.40

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Solution

The fourth proportional to 10,971, 16,458.88 and 5,124.40 is: 7,687.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,971 : 16,458.88 = 5,124.40 : x
  2. Step 2: Convert to fraction form
    10,971/16,458.88 = 5,124.40/x
  3. Step 3: Cross multiply
    10,971x = 16,458.88 × 5,124.40
  4. Step 4: Simplify right side
    10,971x = 84,341,884.67
  5. Step 5: Solve for x
    x = 84,341,884.67/10,971
  6. Step 6: Final answer
    x = 7,687.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.