Home / 7,279.20-10,891.80-5,335.20

Finding the Fourth Proportional to 7,279.20, 10,891.80 and 5,335.20

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Solution

The fourth proportional to 7,279.20, 10,891.80 and 5,335.20 is: 7,983.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,279.20 : 10,891.80 = 5,335.20 : x
  2. Step 2: Convert to fraction form
    7,279.20/10,891.80 = 5,335.20/x
  3. Step 3: Cross multiply
    7,279.20x = 10,891.80 × 5,335.20
  4. Step 4: Simplify right side
    7,279.20x = 58,109,931.36
  5. Step 5: Solve for x
    x = 58,109,931.36/7,279.20
  6. Step 6: Final answer
    x = 7,983.01

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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.