Home / 7,218.85-9,962.01-3,906.85

Finding the Fourth Proportional to 7,218.85, 9,962.01 and 3,906.85

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Solution

The fourth proportional to 7,218.85, 9,962.01 and 3,906.85 is: 5,391.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218.85 : 9,962.01 = 3,906.85 : x
  2. Step 2: Convert to fraction form
    7,218.85/9,962.01 = 3,906.85/x
  3. Step 3: Cross multiply
    7,218.85x = 9,962.01 × 3,906.85
  4. Step 4: Simplify right side
    7,218.85x = 38,920,009.42
  5. Step 5: Solve for x
    x = 38,920,009.42/7,218.85
  6. Step 6: Final answer
    x = 5,391.45

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.