Home / 12,781.78-19,172.67-5,856.28

Finding the Fourth Proportional to 12,781.78, 19,172.67 and 5,856.28

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Solution

The fourth proportional to 12,781.78, 19,172.67 and 5,856.28 is: 8,784.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,781.78 : 19,172.67 = 5,856.28 : x
  2. Step 2: Convert to fraction form
    12,781.78/19,172.67 = 5,856.28/x
  3. Step 3: Cross multiply
    12,781.78x = 19,172.67 × 5,856.28
  4. Step 4: Simplify right side
    12,781.78x = 112,280,523.87
  5. Step 5: Solve for x
    x = 112,280,523.87/12,781.78
  6. Step 6: Final answer
    x = 8,784.42

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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.