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Finding the Fourth Proportional to 13,500.87, 20,126.15 and 13,287.64

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Solution

The fourth proportional to 13,500.87, 20,126.15 and 13,287.64 is: 19,808.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,500.87 : 20,126.15 = 13,287.64 : x
  2. Step 2: Convert to fraction form
    13,500.87/20,126.15 = 13,287.64/x
  3. Step 3: Cross multiply
    13,500.87x = 20,126.15 × 13,287.64
  4. Step 4: Simplify right side
    13,500.87x = 267,428,868.72
  5. Step 5: Solve for x
    x = 267,428,868.72/13,500.87
  6. Step 6: Final answer
    x = 19,808.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.