Home / 7,279.20-10,918.80-3,330.45

Finding the Fourth Proportional to 7,279.20, 10,918.80 and 3,330.45

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Solution

The fourth proportional to 7,279.20, 10,918.80 and 3,330.45 is: 4,995.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,279.20 : 10,918.80 = 3,330.45 : x
  2. Step 2: Convert to fraction form
    7,279.20/10,918.80 = 3,330.45/x
  3. Step 3: Cross multiply
    7,279.20x = 10,918.80 × 3,330.45
  4. Step 4: Simplify right side
    7,279.20x = 36,364,517.46
  5. Step 5: Solve for x
    x = 36,364,517.46/7,279.20
  6. Step 6: Final answer
    x = 4,995.68

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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.