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Finding the Fourth Proportional to 28,415.92, 42,594.15 and 9,689.39

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Solution

The fourth proportional to 28,415.92, 42,594.15 and 9,689.39 is: 14,523.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.92 : 42,594.15 = 9,689.39 : x
  2. Step 2: Convert to fraction form
    28,415.92/42,594.15 = 9,689.39/x
  3. Step 3: Cross multiply
    28,415.92x = 42,594.15 × 9,689.39
  4. Step 4: Simplify right side
    28,415.92x = 412,711,331.07
  5. Step 5: Solve for x
    x = 412,711,331.07/28,415.92
  6. Step 6: Final answer
    x = 14,523.95

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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.