Home / 6,987.96-9,640.66-4,002.20

Finding the Fourth Proportional to 6,987.96, 9,640.66 and 4,002.20

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Solution

The fourth proportional to 6,987.96, 9,640.66 and 4,002.20 is: 5,521.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987.96 : 9,640.66 = 4,002.20 : x
  2. Step 2: Convert to fraction form
    6,987.96/9,640.66 = 4,002.20/x
  3. Step 3: Cross multiply
    6,987.96x = 9,640.66 × 4,002.20
  4. Step 4: Simplify right side
    6,987.96x = 38,583,849.45
  5. Step 5: Solve for x
    x = 38,583,849.45/6,987.96
  6. Step 6: Final answer
    x = 5,521.48

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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.