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Finding the Fourth Proportional to 7,278.01, 10,043.90 and 4,091.86

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Solution

The fourth proportional to 7,278.01, 10,043.90 and 4,091.86 is: 5,646.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,278.01 : 10,043.90 = 4,091.86 : x
  2. Step 2: Convert to fraction form
    7,278.01/10,043.90 = 4,091.86/x
  3. Step 3: Cross multiply
    7,278.01x = 10,043.90 × 4,091.86
  4. Step 4: Simplify right side
    7,278.01x = 41,098,212.19
  5. Step 5: Solve for x
    x = 41,098,212.19/7,278.01
  6. Step 6: Final answer
    x = 5,646.90

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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.