Home / 31,686.92-43,726.26-18,940.40

Finding the Fourth Proportional to 31,686.92, 43,726.26 and 18,940.40

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Solution

The fourth proportional to 31,686.92, 43,726.26 and 18,940.40 is: 26,136.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,686.92 : 43,726.26 = 18,940.40 : x
  2. Step 2: Convert to fraction form
    31,686.92/43,726.26 = 18,940.40/x
  3. Step 3: Cross multiply
    31,686.92x = 43,726.26 × 18,940.40
  4. Step 4: Simplify right side
    31,686.92x = 828,192,854.90
  5. Step 5: Solve for x
    x = 828,192,854.90/31,686.92
  6. Step 6: Final answer
    x = 26,136.74

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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.