Home / 16,815.20-25,220.10-5,125.70

Finding the Fourth Proportional to 16,815.20, 25,220.10 and 5,125.70

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Solution

The fourth proportional to 16,815.20, 25,220.10 and 5,125.70 is: 7,687.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,815.20 : 25,220.10 = 5,125.70 : x
  2. Step 2: Convert to fraction form
    16,815.20/25,220.10 = 5,125.70/x
  3. Step 3: Cross multiply
    16,815.20x = 25,220.10 × 5,125.70
  4. Step 4: Simplify right side
    16,815.20x = 129,270,666.57
  5. Step 5: Solve for x
    x = 129,270,666.57/16,815.20
  6. Step 6: Final answer
    x = 7,687.73

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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.