Home / 8,219.12-12,306.78-6,422.27

Finding the Fourth Proportional to 8,219.12, 12,306.78 and 6,422.27

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Solution

The fourth proportional to 8,219.12, 12,306.78 and 6,422.27 is: 9,616.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,219.12 : 12,306.78 = 6,422.27 : x
  2. Step 2: Convert to fraction form
    8,219.12/12,306.78 = 6,422.27/x
  3. Step 3: Cross multiply
    8,219.12x = 12,306.78 × 6,422.27
  4. Step 4: Simplify right side
    8,219.12x = 79,037,402.46
  5. Step 5: Solve for x
    x = 79,037,402.46/8,219.12
  6. Step 6: Final answer
    x = 9,616.29

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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.