Home / 12,219.64-18,331.04-3,454.79

Finding the Fourth Proportional to 12,219.64, 18,331.04 and 3,454.79

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Solution

The fourth proportional to 12,219.64, 18,331.04 and 3,454.79 is: 5,182.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.64 : 18,331.04 = 3,454.79 : x
  2. Step 2: Convert to fraction form
    12,219.64/18,331.04 = 3,454.79/x
  3. Step 3: Cross multiply
    12,219.64x = 18,331.04 × 3,454.79
  4. Step 4: Simplify right side
    12,219.64x = 63,329,810.66
  5. Step 5: Solve for x
    x = 63,329,810.66/12,219.64
  6. Step 6: Final answer
    x = 5,182.63

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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.