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Finding the Fourth Proportional to 51,612.96, 71,221.80 and 28,948.92

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Solution

The fourth proportional to 51,612.96, 71,221.80 and 28,948.92 is: 39,947.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,612.96 : 71,221.80 = 28,948.92 : x
  2. Step 2: Convert to fraction form
    51,612.96/71,221.80 = 28,948.92/x
  3. Step 3: Cross multiply
    51,612.96x = 71,221.80 × 28,948.92
  4. Step 4: Simplify right side
    51,612.96x = 2,061,794,190.46
  5. Step 5: Solve for x
    x = 2,061,794,190.46/51,612.96
  6. Step 6: Final answer
    x = 39,947.22

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.