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Finding the Fourth Proportional to 20,535.57, 30,804.66 and 8,687.13

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Solution

The fourth proportional to 20,535.57, 30,804.66 and 8,687.13 is: 13,031.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,535.57 : 30,804.66 = 8,687.13 : x
  2. Step 2: Convert to fraction form
    20,535.57/30,804.66 = 8,687.13/x
  3. Step 3: Cross multiply
    20,535.57x = 30,804.66 × 8,687.13
  4. Step 4: Simplify right side
    20,535.57x = 267,604,086.03
  5. Step 5: Solve for x
    x = 267,604,086.03/20,535.57
  6. Step 6: Final answer
    x = 13,031.25

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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.