Home / 8,187.40-12,278.10-2,642.20

Finding the Fourth Proportional to 8,187.40, 12,278.10 and 2,642.20

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Solution

The fourth proportional to 8,187.40, 12,278.10 and 2,642.20 is: 3,962.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,187.40 : 12,278.10 = 2,642.20 : x
  2. Step 2: Convert to fraction form
    8,187.40/12,278.10 = 2,642.20/x
  3. Step 3: Cross multiply
    8,187.40x = 12,278.10 × 2,642.20
  4. Step 4: Simplify right side
    8,187.40x = 32,441,195.82
  5. Step 5: Solve for x
    x = 32,441,195.82/8,187.40
  6. Step 6: Final answer
    x = 3,962.33

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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.