Home / 31,677.90-43,711.18-18,928.39

Finding the Fourth Proportional to 31,677.90, 43,711.18 and 18,928.39

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Solution

The fourth proportional to 31,677.90, 43,711.18 and 18,928.39 is: 26,118.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,677.90 : 43,711.18 = 18,928.39 : x
  2. Step 2: Convert to fraction form
    31,677.90/43,711.18 = 18,928.39/x
  3. Step 3: Cross multiply
    31,677.90x = 43,711.18 × 18,928.39
  4. Step 4: Simplify right side
    31,677.90x = 827,382,105.80
  5. Step 5: Solve for x
    x = 827,382,105.80/31,677.90
  6. Step 6: Final answer
    x = 26,118.59

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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.