Home / 20,761.57-31,102.21-17,389.78

Finding the Fourth Proportional to 20,761.57, 31,102.21 and 17,389.78

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Solution

The fourth proportional to 20,761.57, 31,102.21 and 17,389.78 is: 26,051.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.57 : 31,102.21 = 17,389.78 : x
  2. Step 2: Convert to fraction form
    20,761.57/31,102.21 = 17,389.78/x
  3. Step 3: Cross multiply
    20,761.57x = 31,102.21 × 17,389.78
  4. Step 4: Simplify right side
    20,761.57x = 540,860,589.41
  5. Step 5: Solve for x
    x = 540,860,589.41/20,761.57
  6. Step 6: Final answer
    x = 26,051.04

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1.5x scale

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.