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Finding the Fourth Proportional to 18,680.48, 27,991.50 and 15,895.70

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Solution

The fourth proportional to 18,680.48, 27,991.50 and 15,895.70 is: 23,818.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,680.48 : 27,991.50 = 15,895.70 : x
  2. Step 2: Convert to fraction form
    18,680.48/27,991.50 = 15,895.70/x
  3. Step 3: Cross multiply
    18,680.48x = 27,991.50 × 15,895.70
  4. Step 4: Simplify right side
    18,680.48x = 444,944,486.55
  5. Step 5: Solve for x
    x = 444,944,486.55/18,680.48
  6. Step 6: Final answer
    x = 23,818.69

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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.