Home / 30,979.97-42,755.17-17,555.54

Finding the Fourth Proportional to 30,979.97, 42,755.17 and 17,555.54

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Solution

The fourth proportional to 30,979.97, 42,755.17 and 17,555.54 is: 24,228.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,979.97 : 42,755.17 = 17,555.54 : x
  2. Step 2: Convert to fraction form
    30,979.97/42,755.17 = 17,555.54/x
  3. Step 3: Cross multiply
    30,979.97x = 42,755.17 × 17,555.54
  4. Step 4: Simplify right side
    30,979.97x = 750,590,228.86
  5. Step 5: Solve for x
    x = 750,590,228.86/30,979.97
  6. Step 6: Final answer
    x = 24,228.25

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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.