Home / 31,826.40-43,923.90-18,215.69

Finding the Fourth Proportional to 31,826.40, 43,923.90 and 18,215.69

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Solution

The fourth proportional to 31,826.40, 43,923.90 and 18,215.69 is: 25,139.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,826.40 : 43,923.90 = 18,215.69 : x
  2. Step 2: Convert to fraction form
    31,826.40/43,923.90 = 18,215.69/x
  3. Step 3: Cross multiply
    31,826.40x = 43,923.90 × 18,215.69
  4. Step 4: Simplify right side
    31,826.40x = 800,103,994.68
  5. Step 5: Solve for x
    x = 800,103,994.68/31,826.40
  6. Step 6: Final answer
    x = 25,139.64

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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.