Home / 31,687.72-43,726.10-18,938.39

Finding the Fourth Proportional to 31,687.72, 43,726.10 and 18,938.39

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Solution

The fourth proportional to 31,687.72, 43,726.10 and 18,938.39 is: 26,133.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,687.72 : 43,726.10 = 18,938.39 : x
  2. Step 2: Convert to fraction form
    31,687.72/43,726.10 = 18,938.39/x
  3. Step 3: Cross multiply
    31,687.72x = 43,726.10 × 18,938.39
  4. Step 4: Simplify right side
    31,687.72x = 828,101,621.66
  5. Step 5: Solve for x
    x = 828,101,621.66/31,687.72
  6. Step 6: Final answer
    x = 26,133.21

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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.