Home / 11,718.60-16,172.64-7,002.78

Finding the Fourth Proportional to 11,718.60, 16,172.64 and 7,002.78

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Solution

The fourth proportional to 11,718.60, 16,172.64 and 7,002.78 is: 9,664.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,718.60 : 16,172.64 = 7,002.78 : x
  2. Step 2: Convert to fraction form
    11,718.60/16,172.64 = 7,002.78/x
  3. Step 3: Cross multiply
    11,718.60x = 16,172.64 × 7,002.78
  4. Step 4: Simplify right side
    11,718.60x = 113,253,439.94
  5. Step 5: Solve for x
    x = 113,253,439.94/11,718.60
  6. Step 6: Final answer
    x = 9,664.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.