Home / 11,431.68-15,778.80-6,719.12

Finding the Fourth Proportional to 11,431.68, 15,778.80 and 6,719.12

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Solution

The fourth proportional to 11,431.68, 15,778.80 and 6,719.12 is: 9,274.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,431.68 : 15,778.80 = 6,719.12 : x
  2. Step 2: Convert to fraction form
    11,431.68/15,778.80 = 6,719.12/x
  3. Step 3: Cross multiply
    11,431.68x = 15,778.80 × 6,719.12
  4. Step 4: Simplify right side
    11,431.68x = 106,019,650.66
  5. Step 5: Solve for x
    x = 106,019,650.66/11,431.68
  6. Step 6: Final answer
    x = 9,274.20

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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.