Home / 21,073.12-31,609.68-5,490.88

Finding the Fourth Proportional to 21,073.12, 31,609.68 and 5,490.88

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Solution

The fourth proportional to 21,073.12, 31,609.68 and 5,490.88 is: 8,236.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,073.12 : 31,609.68 = 5,490.88 : x
  2. Step 2: Convert to fraction form
    21,073.12/31,609.68 = 5,490.88/x
  3. Step 3: Cross multiply
    21,073.12x = 31,609.68 × 5,490.88
  4. Step 4: Simplify right side
    21,073.12x = 173,564,959.72
  5. Step 5: Solve for x
    x = 173,564,959.72/21,073.12
  6. Step 6: Final answer
    x = 8,236.32

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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.