Home / 31,491.46-43,444.15-21,279.19

Finding the Fourth Proportional to 31,491.46, 43,444.15 and 21,279.19

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Solution

The fourth proportional to 31,491.46, 43,444.15 and 21,279.19 is: 29,355.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,491.46 : 43,444.15 = 21,279.19 : x
  2. Step 2: Convert to fraction form
    31,491.46/43,444.15 = 21,279.19/x
  3. Step 3: Cross multiply
    31,491.46x = 43,444.15 × 21,279.19
  4. Step 4: Simplify right side
    31,491.46x = 924,455,998.62
  5. Step 5: Solve for x
    x = 924,455,998.62/31,491.46
  6. Step 6: Final answer
    x = 29,355.77

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.