Home / 20,714.10-31,071.16-5,131.74

Finding the Fourth Proportional to 20,714.10, 31,071.16 and 5,131.74

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Solution

The fourth proportional to 20,714.10, 31,071.16 and 5,131.74 is: 7,697.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,714.10 : 31,071.16 = 5,131.74 : x
  2. Step 2: Convert to fraction form
    20,714.10/31,071.16 = 5,131.74/x
  3. Step 3: Cross multiply
    20,714.10x = 31,071.16 × 5,131.74
  4. Step 4: Simplify right side
    20,714.10x = 159,449,114.62
  5. Step 5: Solve for x
    x = 159,449,114.62/20,714.10
  6. Step 6: Final answer
    x = 7,697.61

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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.