Home / 31,221.12-43,073.28-19,889.28

Finding the Fourth Proportional to 31,221.12, 43,073.28 and 19,889.28

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Solution

The fourth proportional to 31,221.12, 43,073.28 and 19,889.28 is: 27,439.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,221.12 : 43,073.28 = 19,889.28 : x
  2. Step 2: Convert to fraction form
    31,221.12/43,073.28 = 19,889.28/x
  3. Step 3: Cross multiply
    31,221.12x = 43,073.28 × 19,889.28
  4. Step 4: Simplify right side
    31,221.12x = 856,696,526.44
  5. Step 5: Solve for x
    x = 856,696,526.44/31,221.12
  6. Step 6: Final answer
    x = 27,439.65

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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.