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Finding the Fourth Proportional to 47,273.70, 70,910.55 and 20,981.10

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Solution

The fourth proportional to 47,273.70, 70,910.55 and 20,981.10 is: 31,471.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,273.70 : 70,910.55 = 20,981.10 : x
  2. Step 2: Convert to fraction form
    47,273.70/70,910.55 = 20,981.10/x
  3. Step 3: Cross multiply
    47,273.70x = 70,910.55 × 20,981.10
  4. Step 4: Simplify right side
    47,273.70x = 1,487,781,340.61
  5. Step 5: Solve for x
    x = 1,487,781,340.61/47,273.70
  6. Step 6: Final answer
    x = 31,471.65

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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.