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Finding the Fourth Proportional to 18,772.88, 28,165.56 and 7,087.12

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Solution

The fourth proportional to 18,772.88, 28,165.56 and 7,087.12 is: 10,633.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.88 : 28,165.56 = 7,087.12 : x
  2. Step 2: Convert to fraction form
    18,772.88/28,165.56 = 7,087.12/x
  3. Step 3: Cross multiply
    18,772.88x = 28,165.56 × 7,087.12
  4. Step 4: Simplify right side
    18,772.88x = 199,612,703.59
  5. Step 5: Solve for x
    x = 199,612,703.59/18,772.88
  6. Step 6: Final answer
    x = 10,633.04

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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.