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Finding the Fourth Proportional to 18,873.95, 28,286.48 and 7,767.77

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Solution

The fourth proportional to 18,873.95, 28,286.48 and 7,767.77 is: 11,641.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,873.95 : 28,286.48 = 7,767.77 : x
  2. Step 2: Convert to fraction form
    18,873.95/28,286.48 = 7,767.77/x
  3. Step 3: Cross multiply
    18,873.95x = 28,286.48 × 7,767.77
  4. Step 4: Simplify right side
    18,873.95x = 219,722,748.74
  5. Step 5: Solve for x
    x = 219,722,748.74/18,873.95
  6. Step 6: Final answer
    x = 11,641.59

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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.