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Finding the Fourth Proportional to 20,287.59, 30,435.71 and 8,600.55

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Solution

The fourth proportional to 20,287.59, 30,435.71 and 8,600.55 is: 12,902.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,287.59 : 30,435.71 = 8,600.55 : x
  2. Step 2: Convert to fraction form
    20,287.59/30,435.71 = 8,600.55/x
  3. Step 3: Cross multiply
    20,287.59x = 30,435.71 × 8,600.55
  4. Step 4: Simplify right side
    20,287.59x = 261,763,802.64
  5. Step 5: Solve for x
    x = 261,763,802.64/20,287.59
  6. Step 6: Final answer
    x = 12,902.66

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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.