Home / 11,520.16-17,280.13-5,278.41

Finding the Fourth Proportional to 11,520.16, 17,280.13 and 5,278.41

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Solution

The fourth proportional to 11,520.16, 17,280.13 and 5,278.41 is: 7,917.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,520.16 : 17,280.13 = 5,278.41 : x
  2. Step 2: Convert to fraction form
    11,520.16/17,280.13 = 5,278.41/x
  3. Step 3: Cross multiply
    11,520.16x = 17,280.13 × 5,278.41
  4. Step 4: Simplify right side
    11,520.16x = 91,211,610.99
  5. Step 5: Solve for x
    x = 91,211,610.99/11,520.16
  6. Step 6: Final answer
    x = 7,917.56

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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.