Home / 12,143.36-18,244.20-7,769.36

Finding the Fourth Proportional to 12,143.36, 18,244.20 and 7,769.36

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Solution

The fourth proportional to 12,143.36, 18,244.20 and 7,769.36 is: 11,672.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.36 : 18,244.20 = 7,769.36 : x
  2. Step 2: Convert to fraction form
    12,143.36/18,244.20 = 7,769.36/x
  3. Step 3: Cross multiply
    12,143.36x = 18,244.20 × 7,769.36
  4. Step 4: Simplify right side
    12,143.36x = 141,745,757.71
  5. Step 5: Solve for x
    x = 141,745,757.71/12,143.36
  6. Step 6: Final answer
    x = 11,672.70

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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.