Home / 31,686.31-43,727.15-19,749.64

Finding the Fourth Proportional to 31,686.31, 43,727.15 and 19,749.64

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Solution

The fourth proportional to 31,686.31, 43,727.15 and 19,749.64 is: 27,254.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,686.31 : 43,727.15 = 19,749.64 : x
  2. Step 2: Convert to fraction form
    31,686.31/43,727.15 = 19,749.64/x
  3. Step 3: Cross multiply
    31,686.31x = 43,727.15 × 19,749.64
  4. Step 4: Simplify right side
    31,686.31x = 863,595,470.73
  5. Step 5: Solve for x
    x = 863,595,470.73/31,686.31
  6. Step 6: Final answer
    x = 27,254.53

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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.