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Finding the Fourth Proportional to 7,129.56, 9,843.54 and 4,339.92

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Solution

The fourth proportional to 7,129.56, 9,843.54 and 4,339.92 is: 5,991.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.56 : 9,843.54 = 4,339.92 : x
  2. Step 2: Convert to fraction form
    7,129.56/9,843.54 = 4,339.92/x
  3. Step 3: Cross multiply
    7,129.56x = 9,843.54 × 4,339.92
  4. Step 4: Simplify right side
    7,129.56x = 42,720,176.12
  5. Step 5: Solve for x
    x = 42,720,176.12/7,129.56
  6. Step 6: Final answer
    x = 5,991.98

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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.