Home / 6,638.16-9,161.66-3,987.02

Finding the Fourth Proportional to 6,638.16, 9,161.66 and 3,987.02

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Solution

The fourth proportional to 6,638.16, 9,161.66 and 3,987.02 is: 5,502.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.16 : 9,161.66 = 3,987.02 : x
  2. Step 2: Convert to fraction form
    6,638.16/9,161.66 = 3,987.02/x
  3. Step 3: Cross multiply
    6,638.16x = 9,161.66 × 3,987.02
  4. Step 4: Simplify right side
    6,638.16x = 36,527,721.65
  5. Step 5: Solve for x
    x = 36,527,721.65/6,638.16
  6. Step 6: Final answer
    x = 5,502.69

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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.