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Finding the Fourth Proportional to 6,780.98, 9,357 and 3,947.96

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Solution

The fourth proportional to 6,780.98, 9,357 and 3,947.96 is: 5,447.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,780.98 : 9,357 = 3,947.96 : x
  2. Step 2: Convert to fraction form
    6,780.98/9,357 = 3,947.96/x
  3. Step 3: Cross multiply
    6,780.98x = 9,357 × 3,947.96
  4. Step 4: Simplify right side
    6,780.98x = 36,941,061.72
  5. Step 5: Solve for x
    x = 36,941,061.72/6,780.98
  6. Step 6: Final answer
    x = 5,447.75

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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.