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Finding the Fourth Proportional to 7,191.42, 9,920.07 and 4,394.94

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Solution

The fourth proportional to 7,191.42, 9,920.07 and 4,394.94 is: 6,062.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.42 : 9,920.07 = 4,394.94 : x
  2. Step 2: Convert to fraction form
    7,191.42/9,920.07 = 4,394.94/x
  3. Step 3: Cross multiply
    7,191.42x = 9,920.07 × 4,394.94
  4. Step 4: Simplify right side
    7,191.42x = 43,598,112.45
  5. Step 5: Solve for x
    x = 43,598,112.45/7,191.42
  6. Step 6: Final answer
    x = 6,062.52

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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.