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Finding the Fourth Proportional to 7,209.88, 9,947.92 and 4,066.08

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Solution

The fourth proportional to 7,209.88, 9,947.92 and 4,066.08 is: 5,610.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,209.88 : 9,947.92 = 4,066.08 : x
  2. Step 2: Convert to fraction form
    7,209.88/9,947.92 = 4,066.08/x
  3. Step 3: Cross multiply
    7,209.88x = 9,947.92 × 4,066.08
  4. Step 4: Simplify right side
    7,209.88x = 40,449,038.55
  5. Step 5: Solve for x
    x = 40,449,038.55/7,209.88
  6. Step 6: Final answer
    x = 5,610.22

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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.