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Finding the Fourth Proportional to 8,106.40, 11,192.40 and 6,119.20

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Solution

The fourth proportional to 8,106.40, 11,192.40 and 6,119.20 is: 8,448.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,106.40 : 11,192.40 = 6,119.20 : x
  2. Step 2: Convert to fraction form
    8,106.40/11,192.40 = 6,119.20/x
  3. Step 3: Cross multiply
    8,106.40x = 11,192.40 × 6,119.20
  4. Step 4: Simplify right side
    8,106.40x = 68,488,534.08
  5. Step 5: Solve for x
    x = 68,488,534.08/8,106.40
  6. Step 6: Final answer
    x = 8,448.70

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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.