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Finding the Fourth Proportional to 18,769, 28,153.50 and 7,079.49

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Solution

The fourth proportional to 18,769, 28,153.50 and 7,079.49 is: 10,619.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,769 : 28,153.50 = 7,079.49 : x
  2. Step 2: Convert to fraction form
    18,769/28,153.50 = 7,079.49/x
  3. Step 3: Cross multiply
    18,769x = 28,153.50 × 7,079.49
  4. Step 4: Simplify right side
    18,769x = 199,312,421.72
  5. Step 5: Solve for x
    x = 199,312,421.72/18,769
  6. Step 6: Final answer
    x = 10,619.24

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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.