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Finding the Fourth Proportional to 7,278.08, 10,043.12 and 4,047.28

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Solution

The fourth proportional to 7,278.08, 10,043.12 and 4,047.28 is: 5,584.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,278.08 : 10,043.12 = 4,047.28 : x
  2. Step 2: Convert to fraction form
    7,278.08/10,043.12 = 4,047.28/x
  3. Step 3: Cross multiply
    7,278.08x = 10,043.12 × 4,047.28
  4. Step 4: Simplify right side
    7,278.08x = 40,647,318.71
  5. Step 5: Solve for x
    x = 40,647,318.71/7,278.08
  6. Step 6: Final answer
    x = 5,584.90

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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.