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Finding the Fourth Proportional to 20,543.86, 30,799.65 and 8,687.93

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Solution

The fourth proportional to 20,543.86, 30,799.65 and 8,687.93 is: 13,025.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,543.86 : 30,799.65 = 8,687.93 : x
  2. Step 2: Convert to fraction form
    20,543.86/30,799.65 = 8,687.93/x
  3. Step 3: Cross multiply
    20,543.86x = 30,799.65 × 8,687.93
  4. Step 4: Simplify right side
    20,543.86x = 267,585,203.22
  5. Step 5: Solve for x
    x = 267,585,203.22/20,543.86
  6. Step 6: Final answer
    x = 13,025.07

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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.