Home / 31,400.76-43,340.49-17,979.75

Finding the Fourth Proportional to 31,400.76, 43,340.49 and 17,979.75

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Solution

The fourth proportional to 31,400.76, 43,340.49 and 17,979.75 is: 24,816.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,400.76 : 43,340.49 = 17,979.75 : x
  2. Step 2: Convert to fraction form
    31,400.76/43,340.49 = 17,979.75/x
  3. Step 3: Cross multiply
    31,400.76x = 43,340.49 × 17,979.75
  4. Step 4: Simplify right side
    31,400.76x = 779,251,175.08
  5. Step 5: Solve for x
    x = 779,251,175.08/31,400.76
  6. Step 6: Final answer
    x = 24,816.32

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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.