Home / 20,079.70-27,711.09-11,127.02

Finding the Fourth Proportional to 20,079.70, 27,711.09 and 11,127.02

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Solution

The fourth proportional to 20,079.70, 27,711.09 and 11,127.02 is: 15,355.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.70 : 27,711.09 = 11,127.02 : x
  2. Step 2: Convert to fraction form
    20,079.70/27,711.09 = 11,127.02/x
  3. Step 3: Cross multiply
    20,079.70x = 27,711.09 × 11,127.02
  4. Step 4: Simplify right side
    20,079.70x = 308,341,714.10
  5. Step 5: Solve for x
    x = 308,341,714.10/20,079.70
  6. Step 6: Final answer
    x = 15,355.89

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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.