Home / 30,178.88-45,279.12-15,391.52

Finding the Fourth Proportional to 30,178.88, 45,279.12 and 15,391.52

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Solution

The fourth proportional to 30,178.88, 45,279.12 and 15,391.52 is: 23,092.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,178.88 : 45,279.12 = 15,391.52 : x
  2. Step 2: Convert to fraction form
    30,178.88/45,279.12 = 15,391.52/x
  3. Step 3: Cross multiply
    30,178.88x = 45,279.12 × 15,391.52
  4. Step 4: Simplify right side
    30,178.88x = 696,914,481.06
  5. Step 5: Solve for x
    x = 696,914,481.06/30,178.88
  6. Step 6: Final answer
    x = 23,092.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.