Home / 20,757.62-31,136.40-12,440.18

Finding the Fourth Proportional to 20,757.62, 31,136.40 and 12,440.18

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Solution

The fourth proportional to 20,757.62, 31,136.40 and 12,440.18 is: 18,660.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,757.62 : 31,136.40 = 12,440.18 : x
  2. Step 2: Convert to fraction form
    20,757.62/31,136.40 = 12,440.18/x
  3. Step 3: Cross multiply
    20,757.62x = 31,136.40 × 12,440.18
  4. Step 4: Simplify right side
    20,757.62x = 387,342,420.55
  5. Step 5: Solve for x
    x = 387,342,420.55/20,757.62
  6. Step 6: Final answer
    x = 18,660.25

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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.