Home / 10,515.29-15,775.92-4,279.78

Finding the Fourth Proportional to 10,515.29, 15,775.92 and 4,279.78

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Solution

The fourth proportional to 10,515.29, 15,775.92 and 4,279.78 is: 6,420.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.29 : 15,775.92 = 4,279.78 : x
  2. Step 2: Convert to fraction form
    10,515.29/15,775.92 = 4,279.78/x
  3. Step 3: Cross multiply
    10,515.29x = 15,775.92 × 4,279.78
  4. Step 4: Simplify right side
    10,515.29x = 67,517,514.82
  5. Step 5: Solve for x
    x = 67,517,514.82/10,515.29
  6. Step 6: Final answer
    x = 6,420.89

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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.