Home / 10,515.12-15,775.14-3,494.88

Finding the Fourth Proportional to 10,515.12, 15,775.14 and 3,494.88

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Solution

The fourth proportional to 10,515.12, 15,775.14 and 3,494.88 is: 5,243.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.12 : 15,775.14 = 3,494.88 : x
  2. Step 2: Convert to fraction form
    10,515.12/15,775.14 = 3,494.88/x
  3. Step 3: Cross multiply
    10,515.12x = 15,775.14 × 3,494.88
  4. Step 4: Simplify right side
    10,515.12x = 55,132,221.28
  5. Step 5: Solve for x
    x = 55,132,221.28/10,515.12
  6. Step 6: Final answer
    x = 5,243.14

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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.