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Finding the Fourth Proportional to 6,930.88, 9,565.28 and 3,947.68

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Solution

The fourth proportional to 6,930.88, 9,565.28 and 3,947.68 is: 5,448.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,930.88 : 9,565.28 = 3,947.68 : x
  2. Step 2: Convert to fraction form
    6,930.88/9,565.28 = 3,947.68/x
  3. Step 3: Cross multiply
    6,930.88x = 9,565.28 × 3,947.68
  4. Step 4: Simplify right side
    6,930.88x = 37,760,664.55
  5. Step 5: Solve for x
    x = 37,760,664.55/6,930.88
  6. Step 6: Final answer
    x = 5,448.18

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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.