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Finding the Fourth Proportional to 5,176.68, 7,142.86 and 2,938.64

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Solution

The fourth proportional to 5,176.68, 7,142.86 and 2,938.64 is: 4,054.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,176.68 : 7,142.86 = 2,938.64 : x
  2. Step 2: Convert to fraction form
    5,176.68/7,142.86 = 2,938.64/x
  3. Step 3: Cross multiply
    5,176.68x = 7,142.86 × 2,938.64
  4. Step 4: Simplify right side
    5,176.68x = 20,990,294.11
  5. Step 5: Solve for x
    x = 20,990,294.11/5,176.68
  6. Step 6: Final answer
    x = 4,054.78

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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.