Home / 20,752.42-31,128.75-5,170.06

Finding the Fourth Proportional to 20,752.42, 31,128.75 and 5,170.06

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Solution

The fourth proportional to 20,752.42, 31,128.75 and 5,170.06 is: 7,755.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,752.42 : 31,128.75 = 5,170.06 : x
  2. Step 2: Convert to fraction form
    20,752.42/31,128.75 = 5,170.06/x
  3. Step 3: Cross multiply
    20,752.42x = 31,128.75 × 5,170.06
  4. Step 4: Simplify right side
    20,752.42x = 160,937,505.23
  5. Step 5: Solve for x
    x = 160,937,505.23/20,752.42
  6. Step 6: Final answer
    x = 7,755.12

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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.