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Finding the Fourth Proportional to 20,534.52, 30,814.01 and 8,687.67

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Solution

The fourth proportional to 20,534.52, 30,814.01 and 8,687.67 is: 13,036.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,534.52 : 30,814.01 = 8,687.67 : x
  2. Step 2: Convert to fraction form
    20,534.52/30,814.01 = 8,687.67/x
  3. Step 3: Cross multiply
    20,534.52x = 30,814.01 × 8,687.67
  4. Step 4: Simplify right side
    20,534.52x = 267,701,950.26
  5. Step 5: Solve for x
    x = 267,701,950.26/20,534.52
  6. Step 6: Final answer
    x = 13,036.68

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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.