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Finding the Fourth Proportional to 28,468.68, 42,705.18 and 7,692

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Solution

The fourth proportional to 28,468.68, 42,705.18 and 7,692 is: 11,538.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,468.68 : 42,705.18 = 7,692 : x
  2. Step 2: Convert to fraction form
    28,468.68/42,705.18 = 7,692/x
  3. Step 3: Cross multiply
    28,468.68x = 42,705.18 × 7,692
  4. Step 4: Simplify right side
    28,468.68x = 328,488,244.56
  5. Step 5: Solve for x
    x = 328,488,244.56/28,468.68
  6. Step 6: Final answer
    x = 11,538.58

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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.