Home / 12,579.33-18,869-4,265.21

Finding the Fourth Proportional to 12,579.33, 18,869 and 4,265.21

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Solution

The fourth proportional to 12,579.33, 18,869 and 4,265.21 is: 6,397.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.33 : 18,869 = 4,265.21 : x
  2. Step 2: Convert to fraction form
    12,579.33/18,869 = 4,265.21/x
  3. Step 3: Cross multiply
    12,579.33x = 18,869 × 4,265.21
  4. Step 4: Simplify right side
    12,579.33x = 80,480,247.49
  5. Step 5: Solve for x
    x = 80,480,247.49/12,579.33
  6. Step 6: Final answer
    x = 6,397.82

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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.