Home / 20,160.20-27,808.19-12,999.30

Finding the Fourth Proportional to 20,160.20, 27,808.19 and 12,999.30

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Solution

The fourth proportional to 20,160.20, 27,808.19 and 12,999.30 is: 17,930.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,160.20 : 27,808.19 = 12,999.30 : x
  2. Step 2: Convert to fraction form
    20,160.20/27,808.19 = 12,999.30/x
  3. Step 3: Cross multiply
    20,160.20x = 27,808.19 × 12,999.30
  4. Step 4: Simplify right side
    20,160.20x = 361,486,883.74
  5. Step 5: Solve for x
    x = 361,486,883.74/20,160.20
  6. Step 6: Final answer
    x = 17,930.72

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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.