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Finding the Fourth Proportional to 9,321.22, 12,862.94 and 5,339.48

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Solution

The fourth proportional to 9,321.22, 12,862.94 and 5,339.48 is: 7,368.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,321.22 : 12,862.94 = 5,339.48 : x
  2. Step 2: Convert to fraction form
    9,321.22/12,862.94 = 5,339.48/x
  3. Step 3: Cross multiply
    9,321.22x = 12,862.94 × 5,339.48
  4. Step 4: Simplify right side
    9,321.22x = 68,681,410.87
  5. Step 5: Solve for x
    x = 68,681,410.87/9,321.22
  6. Step 6: Final answer
    x = 7,368.29

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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.