Home / 20,758.14-31,136.88-9,658.62

Finding the Fourth Proportional to 20,758.14, 31,136.88 and 9,658.62

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Solution

The fourth proportional to 20,758.14, 31,136.88 and 9,658.62 is: 14,487.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.14 : 31,136.88 = 9,658.62 : x
  2. Step 2: Convert to fraction form
    20,758.14/31,136.88 = 9,658.62/x
  3. Step 3: Cross multiply
    20,758.14x = 31,136.88 × 9,658.62
  4. Step 4: Simplify right side
    20,758.14x = 300,739,291.91
  5. Step 5: Solve for x
    x = 300,739,291.91/20,758.14
  6. Step 6: Final answer
    x = 14,487.78

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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.