Home / 12,586.78-18,882.45-5,187.13

Finding the Fourth Proportional to 12,586.78, 18,882.45 and 5,187.13

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Solution

The fourth proportional to 12,586.78, 18,882.45 and 5,187.13 is: 7,781.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,586.78 : 18,882.45 = 5,187.13 : x
  2. Step 2: Convert to fraction form
    12,586.78/18,882.45 = 5,187.13/x
  3. Step 3: Cross multiply
    12,586.78x = 18,882.45 × 5,187.13
  4. Step 4: Simplify right side
    12,586.78x = 97,945,722.87
  5. Step 5: Solve for x
    x = 97,945,722.87/12,586.78
  6. Step 6: Final answer
    x = 7,781.63

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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.