Home / 20,423.43-28,184.18-11,470.91

Finding the Fourth Proportional to 20,423.43, 28,184.18 and 11,470.91

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Solution

The fourth proportional to 20,423.43, 28,184.18 and 11,470.91 is: 15,829.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.43 : 28,184.18 = 11,470.91 : x
  2. Step 2: Convert to fraction form
    20,423.43/28,184.18 = 11,470.91/x
  3. Step 3: Cross multiply
    20,423.43x = 28,184.18 × 11,470.91
  4. Step 4: Simplify right side
    20,423.43x = 323,297,993.93
  5. Step 5: Solve for x
    x = 323,297,993.93/20,423.43
  6. Step 6: Final answer
    x = 15,829.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.