Home / 20,751.47-31,128.91-8,747.08

Finding the Fourth Proportional to 20,751.47, 31,128.91 and 8,747.08

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Solution

The fourth proportional to 20,751.47, 31,128.91 and 8,747.08 is: 13,121.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.47 : 31,128.91 = 8,747.08 : x
  2. Step 2: Convert to fraction form
    20,751.47/31,128.91 = 8,747.08/x
  3. Step 3: Cross multiply
    20,751.47x = 31,128.91 × 8,747.08
  4. Step 4: Simplify right side
    20,751.47x = 272,287,066.08
  5. Step 5: Solve for x
    x = 272,287,066.08/20,751.47
  6. Step 6: Final answer
    x = 13,121.34

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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.