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Finding the Fourth Proportional to 18,812.80, 25,956.40 and 14,821.52

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Solution

The fourth proportional to 18,812.80, 25,956.40 and 14,821.52 is: 20,449.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.80 : 25,956.40 = 14,821.52 : x
  2. Step 2: Convert to fraction form
    18,812.80/25,956.40 = 14,821.52/x
  3. Step 3: Cross multiply
    18,812.80x = 25,956.40 × 14,821.52
  4. Step 4: Simplify right side
    18,812.80x = 384,713,301.73
  5. Step 5: Solve for x
    x = 384,713,301.73/18,812.80
  6. Step 6: Final answer
    x = 20,449.55

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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.