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Finding the Fourth Proportional to 28,267.60, 39,006.48 and 15,691

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Solution

The fourth proportional to 28,267.60, 39,006.48 and 15,691 is: 21,652.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,267.60 : 39,006.48 = 15,691 : x
  2. Step 2: Convert to fraction form
    28,267.60/39,006.48 = 15,691/x
  3. Step 3: Cross multiply
    28,267.60x = 39,006.48 × 15,691
  4. Step 4: Simplify right side
    28,267.60x = 612,050,677.68
  5. Step 5: Solve for x
    x = 612,050,677.68/28,267.60
  6. Step 6: Final answer
    x = 21,652.02

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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.