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Finding the Fourth Proportional to 40,285.20, 60,425.28 and 12,205.20

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Solution

The fourth proportional to 40,285.20, 60,425.28 and 12,205.20 is: 18,307.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,285.20 : 60,425.28 = 12,205.20 : x
  2. Step 2: Convert to fraction form
    40,285.20/60,425.28 = 12,205.20/x
  3. Step 3: Cross multiply
    40,285.20x = 60,425.28 × 12,205.20
  4. Step 4: Simplify right side
    40,285.20x = 737,502,627.46
  5. Step 5: Solve for x
    x = 737,502,627.46/40,285.20
  6. Step 6: Final answer
    x = 18,307.04

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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.