Home / 31,689.33-43,740-18,951.27

Finding the Fourth Proportional to 31,689.33, 43,740 and 18,951.27

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Solution

The fourth proportional to 31,689.33, 43,740 and 18,951.27 is: 26,157.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,689.33 : 43,740 = 18,951.27 : x
  2. Step 2: Convert to fraction form
    31,689.33/43,740 = 18,951.27/x
  3. Step 3: Cross multiply
    31,689.33x = 43,740 × 18,951.27
  4. Step 4: Simplify right side
    31,689.33x = 828,928,385.78
  5. Step 5: Solve for x
    x = 828,928,385.78/31,689.33
  6. Step 6: Final answer
    x = 26,157.97

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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.