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Finding the Fourth Proportional to 9,348.22, 12,899.91 and 5,155.90

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Solution

The fourth proportional to 9,348.22, 12,899.91 and 5,155.90 is: 7,114.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,348.22 : 12,899.91 = 5,155.90 : x
  2. Step 2: Convert to fraction form
    9,348.22/12,899.91 = 5,155.90/x
  3. Step 3: Cross multiply
    9,348.22x = 12,899.91 × 5,155.90
  4. Step 4: Simplify right side
    9,348.22x = 66,510,645.97
  5. Step 5: Solve for x
    x = 66,510,645.97/9,348.22
  6. Step 6: Final answer
    x = 7,114.79

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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.