Home / 20,120.20-27,792.93-15,462.70

Finding the Fourth Proportional to 20,120.20, 27,792.93 and 15,462.70

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Solution

The fourth proportional to 20,120.20, 27,792.93 and 15,462.70 is: 21,359.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.20 : 27,792.93 = 15,462.70 : x
  2. Step 2: Convert to fraction form
    20,120.20/27,792.93 = 15,462.70/x
  3. Step 3: Cross multiply
    20,120.20x = 27,792.93 × 15,462.70
  4. Step 4: Simplify right side
    20,120.20x = 429,753,738.71
  5. Step 5: Solve for x
    x = 429,753,738.71/20,120.20
  6. Step 6: Final answer
    x = 21,359.32

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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.