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Finding the Fourth Proportional to 18,680.01, 25,780.23 and 13,956.09

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Solution

The fourth proportional to 18,680.01, 25,780.23 and 13,956.09 is: 19,260.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,680.01 : 25,780.23 = 13,956.09 : x
  2. Step 2: Convert to fraction form
    18,680.01/25,780.23 = 13,956.09/x
  3. Step 3: Cross multiply
    18,680.01x = 25,780.23 × 13,956.09
  4. Step 4: Simplify right side
    18,680.01x = 359,791,210.10
  5. Step 5: Solve for x
    x = 359,791,210.10/18,680.01
  6. Step 6: Final answer
    x = 19,260.76

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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.