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Finding the Fourth Proportional to 18,820.67, 25,972.14 and 11,648.68

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Solution

The fourth proportional to 18,820.67, 25,972.14 and 11,648.68 is: 16,074.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.67 : 25,972.14 = 11,648.68 : x
  2. Step 2: Convert to fraction form
    18,820.67/25,972.14 = 11,648.68/x
  3. Step 3: Cross multiply
    18,820.67x = 25,972.14 × 11,648.68
  4. Step 4: Simplify right side
    18,820.67x = 302,541,147.78
  5. Step 5: Solve for x
    x = 302,541,147.78/18,820.67
  6. Step 6: Final answer
    x = 16,074.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.