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Finding the Fourth Proportional to 9,079.40, 13,619.10 and 8,604.20

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Solution

The fourth proportional to 9,079.40, 13,619.10 and 8,604.20 is: 12,906.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,079.40 : 13,619.10 = 8,604.20 : x
  2. Step 2: Convert to fraction form
    9,079.40/13,619.10 = 8,604.20/x
  3. Step 3: Cross multiply
    9,079.40x = 13,619.10 × 8,604.20
  4. Step 4: Simplify right side
    9,079.40x = 117,181,460.22
  5. Step 5: Solve for x
    x = 117,181,460.22/9,079.40
  6. Step 6: Final answer
    x = 12,906.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.