Home / 11,278.92-16,920-4,261.56

Finding the Fourth Proportional to 11,278.92, 16,920 and 4,261.56

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Solution

The fourth proportional to 11,278.92, 16,920 and 4,261.56 is: 6,392.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,278.92 : 16,920 = 4,261.56 : x
  2. Step 2: Convert to fraction form
    11,278.92/16,920 = 4,261.56/x
  3. Step 3: Cross multiply
    11,278.92x = 16,920 × 4,261.56
  4. Step 4: Simplify right side
    11,278.92x = 72,105,595.20
  5. Step 5: Solve for x
    x = 72,105,595.20/11,278.92
  6. Step 6: Final answer
    x = 6,392.95

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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.