Home / 8,178.20-11,288.40-4,820.78

Finding the Fourth Proportional to 8,178.20, 11,288.40 and 4,820.78

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Solution

The fourth proportional to 8,178.20, 11,288.40 and 4,820.78 is: 6,654.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,178.20 : 11,288.40 = 4,820.78 : x
  2. Step 2: Convert to fraction form
    8,178.20/11,288.40 = 4,820.78/x
  3. Step 3: Cross multiply
    8,178.20x = 11,288.40 × 4,820.78
  4. Step 4: Simplify right side
    8,178.20x = 54,418,892.95
  5. Step 5: Solve for x
    x = 54,418,892.95/8,178.20
  6. Step 6: Final answer
    x = 6,654.14

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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.