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Finding the Fourth Proportional to 7,229.95, 9,976.51 and 4,086.13

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Solution

The fourth proportional to 7,229.95, 9,976.51 and 4,086.13 is: 5,638.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,229.95 : 9,976.51 = 4,086.13 : x
  2. Step 2: Convert to fraction form
    7,229.95/9,976.51 = 4,086.13/x
  3. Step 3: Cross multiply
    7,229.95x = 9,976.51 × 4,086.13
  4. Step 4: Simplify right side
    7,229.95x = 40,765,316.81
  5. Step 5: Solve for x
    x = 40,765,316.81/7,229.95
  6. Step 6: Final answer
    x = 5,638.40

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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.