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Finding the Fourth Proportional to 28,269, 39,009.24 and 15,692.76

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Solution

The fourth proportional to 28,269, 39,009.24 and 15,692.76 is: 21,654.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,269 : 39,009.24 = 15,692.76 : x
  2. Step 2: Convert to fraction form
    28,269/39,009.24 = 15,692.76/x
  3. Step 3: Cross multiply
    28,269x = 39,009.24 × 15,692.76
  4. Step 4: Simplify right side
    28,269x = 612,162,641.10
  5. Step 5: Solve for x
    x = 612,162,641.10/28,269
  6. Step 6: Final answer
    x = 21,654.91

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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.