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Finding the Fourth Proportional to 28,592.70, 42,905.90 and 11,951.45

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Solution

The fourth proportional to 28,592.70, 42,905.90 and 11,951.45 is: 17,934.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,592.70 : 42,905.90 = 11,951.45 : x
  2. Step 2: Convert to fraction form
    28,592.70/42,905.90 = 11,951.45/x
  3. Step 3: Cross multiply
    28,592.70x = 42,905.90 × 11,951.45
  4. Step 4: Simplify right side
    28,592.70x = 512,787,694.80
  5. Step 5: Solve for x
    x = 512,787,694.80/28,592.70
  6. Step 6: Final answer
    x = 17,934.22

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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.