Home / 31,479-43,437.12-21,292.26

Finding the Fourth Proportional to 31,479, 43,437.12 and 21,292.26

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Solution

The fourth proportional to 31,479, 43,437.12 and 21,292.26 is: 29,380.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,479 : 43,437.12 = 21,292.26 : x
  2. Step 2: Convert to fraction form
    31,479/43,437.12 = 21,292.26/x
  3. Step 3: Cross multiply
    31,479x = 43,437.12 × 21,292.26
  4. Step 4: Simplify right side
    31,479x = 924,874,452.69
  5. Step 5: Solve for x
    x = 924,874,452.69/31,479
  6. Step 6: Final answer
    x = 29,380.68

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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.