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Finding the Fourth Proportional to 28,266.54, 39,006 and 15,691.20

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Solution

The fourth proportional to 28,266.54, 39,006 and 15,691.20 is: 21,652.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,266.54 : 39,006 = 15,691.20 : x
  2. Step 2: Convert to fraction form
    28,266.54/39,006 = 15,691.20/x
  3. Step 3: Cross multiply
    28,266.54x = 39,006 × 15,691.20
  4. Step 4: Simplify right side
    28,266.54x = 612,050,947.20
  5. Step 5: Solve for x
    x = 612,050,947.20/28,266.54
  6. Step 6: Final answer
    x = 21,652.84

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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.