Home / 20,751.91-31,127.10-11,396.31

Finding the Fourth Proportional to 20,751.91, 31,127.10 and 11,396.31

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Solution

The fourth proportional to 20,751.91, 31,127.10 and 11,396.31 is: 17,094.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.91 : 31,127.10 = 11,396.31 : x
  2. Step 2: Convert to fraction form
    20,751.91/31,127.10 = 11,396.31/x
  3. Step 3: Cross multiply
    20,751.91x = 31,127.10 × 11,396.31
  4. Step 4: Simplify right side
    20,751.91x = 354,734,081.00
  5. Step 5: Solve for x
    x = 354,734,081.00/20,751.91
  6. Step 6: Final answer
    x = 17,094.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.