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Finding the Fourth Proportional to 47,250.80, 70,876.20 and 21,006.80

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Solution

The fourth proportional to 47,250.80, 70,876.20 and 21,006.80 is: 31,510.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,250.80 : 70,876.20 = 21,006.80 : x
  2. Step 2: Convert to fraction form
    47,250.80/70,876.20 = 21,006.80/x
  3. Step 3: Cross multiply
    47,250.80x = 70,876.20 × 21,006.80
  4. Step 4: Simplify right side
    47,250.80x = 1,488,882,158.16
  5. Step 5: Solve for x
    x = 1,488,882,158.16/47,250.80
  6. Step 6: Final answer
    x = 31,510.20

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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.