Home / 30,414.78-42,001.38-28,758.24

Finding the Fourth Proportional to 30,414.78, 42,001.38 and 28,758.24

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Solution

The fourth proportional to 30,414.78, 42,001.38 and 28,758.24 is: 39,713.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,414.78 : 42,001.38 = 28,758.24 : x
  2. Step 2: Convert to fraction form
    30,414.78/42,001.38 = 28,758.24/x
  3. Step 3: Cross multiply
    30,414.78x = 42,001.38 × 28,758.24
  4. Step 4: Simplify right side
    30,414.78x = 1,207,885,766.37
  5. Step 5: Solve for x
    x = 1,207,885,766.37/30,414.78
  6. Step 6: Final answer
    x = 39,713.78

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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.