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Finding the Fourth Proportional to 18,793.65, 28,204.17 and 15,140.01

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Solution

The fourth proportional to 18,793.65, 28,204.17 and 15,140.01 is: 22,721.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.65 : 28,204.17 = 15,140.01 : x
  2. Step 2: Convert to fraction form
    18,793.65/28,204.17 = 15,140.01/x
  3. Step 3: Cross multiply
    18,793.65x = 28,204.17 × 15,140.01
  4. Step 4: Simplify right side
    18,793.65x = 427,011,415.84
  5. Step 5: Solve for x
    x = 427,011,415.84/18,793.65
  6. Step 6: Final answer
    x = 22,721.05

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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.