Home / 30,709.20-42,375.60-17,279.28

Finding the Fourth Proportional to 30,709.20, 42,375.60 and 17,279.28

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Solution

The fourth proportional to 30,709.20, 42,375.60 and 17,279.28 is: 23,843.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,709.20 : 42,375.60 = 17,279.28 : x
  2. Step 2: Convert to fraction form
    30,709.20/42,375.60 = 17,279.28/x
  3. Step 3: Cross multiply
    30,709.20x = 42,375.60 × 17,279.28
  4. Step 4: Simplify right side
    30,709.20x = 732,219,857.57
  5. Step 5: Solve for x
    x = 732,219,857.57/30,709.20
  6. Step 6: Final answer
    x = 23,843.66

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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.