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Finding the Fourth Proportional to 18,888.66, 28,337.04 and 5,742.09

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Solution

The fourth proportional to 18,888.66, 28,337.04 and 5,742.09 is: 8,614.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.66 : 28,337.04 = 5,742.09 : x
  2. Step 2: Convert to fraction form
    18,888.66/28,337.04 = 5,742.09/x
  3. Step 3: Cross multiply
    18,888.66x = 28,337.04 × 5,742.09
  4. Step 4: Simplify right side
    18,888.66x = 162,713,834.01
  5. Step 5: Solve for x
    x = 162,713,834.01/18,888.66
  6. Step 6: Final answer
    x = 8,614.37

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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.