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Finding the Fourth Proportional to 28,167.84, 42,293.16 and 15,712.20

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Solution

The fourth proportional to 28,167.84, 42,293.16 and 15,712.20 is: 23,591.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,167.84 : 42,293.16 = 15,712.20 : x
  2. Step 2: Convert to fraction form
    28,167.84/42,293.16 = 15,712.20/x
  3. Step 3: Cross multiply
    28,167.84x = 42,293.16 × 15,712.20
  4. Step 4: Simplify right side
    28,167.84x = 664,518,588.55
  5. Step 5: Solve for x
    x = 664,518,588.55/28,167.84
  6. Step 6: Final answer
    x = 23,591.39

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1.5x scale

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.