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Finding the Fourth Proportional to 20,302.76, 30,454.15 and 10,947.18

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Solution

The fourth proportional to 20,302.76, 30,454.15 and 10,947.18 is: 16,420.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,302.76 : 30,454.15 = 10,947.18 : x
  2. Step 2: Convert to fraction form
    20,302.76/30,454.15 = 10,947.18/x
  3. Step 3: Cross multiply
    20,302.76x = 30,454.15 × 10,947.18
  4. Step 4: Simplify right side
    20,302.76x = 333,387,169.16
  5. Step 5: Solve for x
    x = 333,387,169.16/20,302.76
  6. Step 6: Final answer
    x = 16,420.78

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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.