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Finding the Fourth Proportional to 18,699.70, 28,042.56 and 6,217.42

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Solution

The fourth proportional to 18,699.70, 28,042.56 and 6,217.42 is: 9,323.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.70 : 28,042.56 = 6,217.42 : x
  2. Step 2: Convert to fraction form
    18,699.70/28,042.56 = 6,217.42/x
  3. Step 3: Cross multiply
    18,699.70x = 28,042.56 × 6,217.42
  4. Step 4: Simplify right side
    18,699.70x = 174,352,373.40
  5. Step 5: Solve for x
    x = 174,352,373.40/18,699.70
  6. Step 6: Final answer
    x = 9,323.81

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1.5x scale

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.