Home / 12,581.28-18,880.43-4,789.89

Finding the Fourth Proportional to 12,581.28, 18,880.43 and 4,789.89

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Solution

The fourth proportional to 12,581.28, 18,880.43 and 4,789.89 is: 7,188.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,581.28 : 18,880.43 = 4,789.89 : x
  2. Step 2: Convert to fraction form
    12,581.28/18,880.43 = 4,789.89/x
  3. Step 3: Cross multiply
    12,581.28x = 18,880.43 × 4,789.89
  4. Step 4: Simplify right side
    12,581.28x = 90,435,158.90
  5. Step 5: Solve for x
    x = 90,435,158.90/12,581.28
  6. Step 6: Final answer
    x = 7,188.07

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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.