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Finding the Fourth Proportional to 18,640.59, 25,722.95 and 10,257.09

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Solution

The fourth proportional to 18,640.59, 25,722.95 and 10,257.09 is: 14,154.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640.59 : 25,722.95 = 10,257.09 : x
  2. Step 2: Convert to fraction form
    18,640.59/25,722.95 = 10,257.09/x
  3. Step 3: Cross multiply
    18,640.59x = 25,722.95 × 10,257.09
  4. Step 4: Simplify right side
    18,640.59x = 263,842,561.93
  5. Step 5: Solve for x
    x = 263,842,561.93/18,640.59
  6. Step 6: Final answer
    x = 14,154.20

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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.