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Finding the Fourth Proportional to 18,446.61, 25,448.81 and 12,860.85

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Solution

The fourth proportional to 18,446.61, 25,448.81 and 12,860.85 is: 17,742.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,446.61 : 25,448.81 = 12,860.85 : x
  2. Step 2: Convert to fraction form
    18,446.61/25,448.81 = 12,860.85/x
  3. Step 3: Cross multiply
    18,446.61x = 25,448.81 × 12,860.85
  4. Step 4: Simplify right side
    18,446.61x = 327,293,263.78
  5. Step 5: Solve for x
    x = 327,293,263.78/18,446.61
  6. Step 6: Final answer
    x = 17,742.73

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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.