Home / 10,721.28-16,076.16-4,879.20

Finding the Fourth Proportional to 10,721.28, 16,076.16 and 4,879.20

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Solution

The fourth proportional to 10,721.28, 16,076.16 and 4,879.20 is: 7,316.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,721.28 : 16,076.16 = 4,879.20 : x
  2. Step 2: Convert to fraction form
    10,721.28/16,076.16 = 4,879.20/x
  3. Step 3: Cross multiply
    10,721.28x = 16,076.16 × 4,879.20
  4. Step 4: Simplify right side
    10,721.28x = 78,438,799.87
  5. Step 5: Solve for x
    x = 78,438,799.87/10,721.28
  6. Step 6: Final answer
    x = 7,316.18

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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.