Home / 31,789.65-43,869.36-18,360.87

Finding the Fourth Proportional to 31,789.65, 43,869.36 and 18,360.87

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Solution

The fourth proportional to 31,789.65, 43,869.36 and 18,360.87 is: 25,337.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,789.65 : 43,869.36 = 18,360.87 : x
  2. Step 2: Convert to fraction form
    31,789.65/43,869.36 = 18,360.87/x
  3. Step 3: Cross multiply
    31,789.65x = 43,869.36 × 18,360.87
  4. Step 4: Simplify right side
    31,789.65x = 805,479,615.94
  5. Step 5: Solve for x
    x = 805,479,615.94/31,789.65
  6. Step 6: Final answer
    x = 25,337.79

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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.