Home / 10,920.96-16,382.56-5,079.28

Finding the Fourth Proportional to 10,920.96, 16,382.56 and 5,079.28

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Solution

The fourth proportional to 10,920.96, 16,382.56 and 5,079.28 is: 7,619.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.96 : 16,382.56 = 5,079.28 : x
  2. Step 2: Convert to fraction form
    10,920.96/16,382.56 = 5,079.28/x
  3. Step 3: Cross multiply
    10,920.96x = 16,382.56 × 5,079.28
  4. Step 4: Simplify right side
    10,920.96x = 83,211,609.36
  5. Step 5: Solve for x
    x = 83,211,609.36/10,920.96
  6. Step 6: Final answer
    x = 7,619.44

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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.