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Finding the Fourth Proportional to 18,854.36, 28,257.12 and 7,748.48

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Solution

The fourth proportional to 18,854.36, 28,257.12 and 7,748.48 is: 11,612.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,854.36 : 28,257.12 = 7,748.48 : x
  2. Step 2: Convert to fraction form
    18,854.36/28,257.12 = 7,748.48/x
  3. Step 3: Cross multiply
    18,854.36x = 28,257.12 × 7,748.48
  4. Step 4: Simplify right side
    18,854.36x = 218,949,729.18
  5. Step 5: Solve for x
    x = 218,949,729.18/18,854.36
  6. Step 6: Final answer
    x = 11,612.68

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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.