Home / 20,752.14-31,128.13-12,434.65

Finding the Fourth Proportional to 20,752.14, 31,128.13 and 12,434.65

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Solution

The fourth proportional to 20,752.14, 31,128.13 and 12,434.65 is: 18,651.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,752.14 : 31,128.13 = 12,434.65 : x
  2. Step 2: Convert to fraction form
    20,752.14/31,128.13 = 12,434.65/x
  3. Step 3: Cross multiply
    20,752.14x = 31,128.13 × 12,434.65
  4. Step 4: Simplify right side
    20,752.14x = 387,067,401.70
  5. Step 5: Solve for x
    x = 387,067,401.70/20,752.14
  6. Step 6: Final answer
    x = 18,651.93

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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.