Home / 31,645.31-43,630.84-20,294.78

Finding the Fourth Proportional to 31,645.31, 43,630.84 and 20,294.78

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Solution

The fourth proportional to 31,645.31, 43,630.84 and 20,294.78 is: 27,981.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,645.31 : 43,630.84 = 20,294.78 : x
  2. Step 2: Convert to fraction form
    31,645.31/43,630.84 = 20,294.78/x
  3. Step 3: Cross multiply
    31,645.31x = 43,630.84 × 20,294.78
  4. Step 4: Simplify right side
    31,645.31x = 885,478,197.54
  5. Step 5: Solve for x
    x = 885,478,197.54/31,645.31
  6. Step 6: Final answer
    x = 27,981.34

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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.