Home / 31,686.31-43,724.13-18,936.94

Finding the Fourth Proportional to 31,686.31, 43,724.13 and 18,936.94

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Solution

The fourth proportional to 31,686.31, 43,724.13 and 18,936.94 is: 26,131.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,686.31 : 43,724.13 = 18,936.94 : x
  2. Step 2: Convert to fraction form
    31,686.31/43,724.13 = 18,936.94/x
  3. Step 3: Cross multiply
    31,686.31x = 43,724.13 × 18,936.94
  4. Step 4: Simplify right side
    31,686.31x = 828,001,226.36
  5. Step 5: Solve for x
    x = 828,001,226.36/31,686.31
  6. Step 6: Final answer
    x = 26,131.20

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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.