Home / 31,550.40-43,545.60-18,979.20

Finding the Fourth Proportional to 31,550.40, 43,545.60 and 18,979.20

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Solution

The fourth proportional to 31,550.40, 43,545.60 and 18,979.20 is: 26,194.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,550.40 : 43,545.60 = 18,979.20 : x
  2. Step 2: Convert to fraction form
    31,550.40/43,545.60 = 18,979.20/x
  3. Step 3: Cross multiply
    31,550.40x = 43,545.60 × 18,979.20
  4. Step 4: Simplify right side
    31,550.40x = 826,460,651.52
  5. Step 5: Solve for x
    x = 826,460,651.52/31,550.40
  6. Step 6: Final answer
    x = 26,194.93

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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.