Home / 20,279.16-30,429.68-10,415.79

Finding the Fourth Proportional to 20,279.16, 30,429.68 and 10,415.79

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Solution

The fourth proportional to 20,279.16, 30,429.68 and 10,415.79 is: 15,629.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.16 : 30,429.68 = 10,415.79 : x
  2. Step 2: Convert to fraction form
    20,279.16/30,429.68 = 10,415.79/x
  3. Step 3: Cross multiply
    20,279.16x = 30,429.68 × 10,415.79
  4. Step 4: Simplify right side
    20,279.16x = 316,949,104.57
  5. Step 5: Solve for x
    x = 316,949,104.57/20,279.16
  6. Step 6: Final answer
    x = 15,629.30

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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.