Home / 20,127.18-27,766.86-12,164.78

Finding the Fourth Proportional to 20,127.18, 27,766.86 and 12,164.78

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Solution

The fourth proportional to 20,127.18, 27,766.86 and 12,164.78 is: 16,782.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.18 : 27,766.86 = 12,164.78 : x
  2. Step 2: Convert to fraction form
    20,127.18/27,766.86 = 12,164.78/x
  3. Step 3: Cross multiply
    20,127.18x = 27,766.86 × 12,164.78
  4. Step 4: Simplify right side
    20,127.18x = 337,777,743.19
  5. Step 5: Solve for x
    x = 337,777,743.19/20,127.18
  6. Step 6: Final answer
    x = 16,782.17

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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.