Home / 12,018.39-18,027.27-5,439.78

Finding the Fourth Proportional to 12,018.39, 18,027.27 and 5,439.78

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Solution

The fourth proportional to 12,018.39, 18,027.27 and 5,439.78 is: 8,159.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,018.39 : 18,027.27 = 5,439.78 : x
  2. Step 2: Convert to fraction form
    12,018.39/18,027.27 = 5,439.78/x
  3. Step 3: Cross multiply
    12,018.39x = 18,027.27 × 5,439.78
  4. Step 4: Simplify right side
    12,018.39x = 98,064,382.80
  5. Step 5: Solve for x
    x = 98,064,382.80/12,018.39
  6. Step 6: Final answer
    x = 8,159.53

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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.