Home / 6,720.80-10,079.76-2,101.28

Finding the Fourth Proportional to 6,720.80, 10,079.76 and 2,101.28

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Solution

The fourth proportional to 6,720.80, 10,079.76 and 2,101.28 is: 3,151.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,720.80 : 10,079.76 = 2,101.28 : x
  2. Step 2: Convert to fraction form
    6,720.80/10,079.76 = 2,101.28/x
  3. Step 3: Cross multiply
    6,720.80x = 10,079.76 × 2,101.28
  4. Step 4: Simplify right side
    6,720.80x = 21,180,398.09
  5. Step 5: Solve for x
    x = 21,180,398.09/6,720.80
  6. Step 6: Final answer
    x = 3,151.47

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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.