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Finding the Fourth Proportional to 6,979.95, 9,632.13 and 3,995.68

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Solution

The fourth proportional to 6,979.95, 9,632.13 and 3,995.68 is: 5,513.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,979.95 : 9,632.13 = 3,995.68 : x
  2. Step 2: Convert to fraction form
    6,979.95/9,632.13 = 3,995.68/x
  3. Step 3: Cross multiply
    6,979.95x = 9,632.13 × 3,995.68
  4. Step 4: Simplify right side
    6,979.95x = 38,486,909.20
  5. Step 5: Solve for x
    x = 38,486,909.20/6,979.95
  6. Step 6: Final answer
    x = 5,513.92

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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.