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Finding the Fourth Proportional to 8,785.68, 13,178.52 and 2,942.88

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Solution

The fourth proportional to 8,785.68, 13,178.52 and 2,942.88 is: 4,414.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,785.68 : 13,178.52 = 2,942.88 : x
  2. Step 2: Convert to fraction form
    8,785.68/13,178.52 = 2,942.88/x
  3. Step 3: Cross multiply
    8,785.68x = 13,178.52 × 2,942.88
  4. Step 4: Simplify right side
    8,785.68x = 38,782,802.94
  5. Step 5: Solve for x
    x = 38,782,802.94/8,785.68
  6. Step 6: Final answer
    x = 4,414.32

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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.