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Finding the Fourth Proportional to 18,956.71, 28,440.53 and 5,811.02

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Solution

The fourth proportional to 18,956.71, 28,440.53 and 5,811.02 is: 8,718.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,956.71 : 28,440.53 = 5,811.02 : x
  2. Step 2: Convert to fraction form
    18,956.71/28,440.53 = 5,811.02/x
  3. Step 3: Cross multiply
    18,956.71x = 28,440.53 × 5,811.02
  4. Step 4: Simplify right side
    18,956.71x = 165,268,488.64
  5. Step 5: Solve for x
    x = 165,268,488.64/18,956.71
  6. Step 6: Final answer
    x = 8,718.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.