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Finding the Fourth Proportional to 8,164.40, 12,214.20 and 7,080.80

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Solution

The fourth proportional to 8,164.40, 12,214.20 and 7,080.80 is: 10,593.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,164.40 : 12,214.20 = 7,080.80 : x
  2. Step 2: Convert to fraction form
    8,164.40/12,214.20 = 7,080.80/x
  3. Step 3: Cross multiply
    8,164.40x = 12,214.20 × 7,080.80
  4. Step 4: Simplify right side
    8,164.40x = 86,486,307.36
  5. Step 5: Solve for x
    x = 86,486,307.36/8,164.40
  6. Step 6: Final answer
    x = 10,593.10

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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.