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Finding the Fourth Proportional to 7,392.78, 11,079.30 and 2,708.40

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Solution

The fourth proportional to 7,392.78, 11,079.30 and 2,708.40 is: 4,058.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,392.78 : 11,079.30 = 2,708.40 : x
  2. Step 2: Convert to fraction form
    7,392.78/11,079.30 = 2,708.40/x
  3. Step 3: Cross multiply
    7,392.78x = 11,079.30 × 2,708.40
  4. Step 4: Simplify right side
    7,392.78x = 30,007,176.12
  5. Step 5: Solve for x
    x = 30,007,176.12/7,392.78
  6. Step 6: Final answer
    x = 4,058.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.