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Finding the Fourth Proportional to 9,189.74, 12,689.10 and 6,005.22

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Solution

The fourth proportional to 9,189.74, 12,689.10 and 6,005.22 is: 8,291.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,189.74 : 12,689.10 = 6,005.22 : x
  2. Step 2: Convert to fraction form
    9,189.74/12,689.10 = 6,005.22/x
  3. Step 3: Cross multiply
    9,189.74x = 12,689.10 × 6,005.22
  4. Step 4: Simplify right side
    9,189.74x = 76,200,837.10
  5. Step 5: Solve for x
    x = 76,200,837.10/9,189.74
  6. Step 6: Final answer
    x = 8,291.95

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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.