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Finding the Fourth Proportional to 48,289.80, 72,434.70 and 20,584.20

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Solution

The fourth proportional to 48,289.80, 72,434.70 and 20,584.20 is: 30,876.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,289.80 : 72,434.70 = 20,584.20 : x
  2. Step 2: Convert to fraction form
    48,289.80/72,434.70 = 20,584.20/x
  3. Step 3: Cross multiply
    48,289.80x = 72,434.70 × 20,584.20
  4. Step 4: Simplify right side
    48,289.80x = 1,491,010,351.74
  5. Step 5: Solve for x
    x = 1,491,010,351.74/48,289.80
  6. Step 6: Final answer
    x = 30,876.30

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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.