Home / 10,127.20-15,181.80-5,449.72

Finding the Fourth Proportional to 10,127.20, 15,181.80 and 5,449.72

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Solution

The fourth proportional to 10,127.20, 15,181.80 and 5,449.72 is: 8,169.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,127.20 : 15,181.80 = 5,449.72 : x
  2. Step 2: Convert to fraction form
    10,127.20/15,181.80 = 5,449.72/x
  3. Step 3: Cross multiply
    10,127.20x = 15,181.80 × 5,449.72
  4. Step 4: Simplify right side
    10,127.20x = 82,736,559.10
  5. Step 5: Solve for x
    x = 82,736,559.10/10,127.20
  6. Step 6: Final answer
    x = 8,169.74

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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.