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Finding the Fourth Proportional to 18,703.46, 28,066.39 and 7,456.82

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Solution

The fourth proportional to 18,703.46, 28,066.39 and 7,456.82 is: 11,189.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.46 : 28,066.39 = 7,456.82 : x
  2. Step 2: Convert to fraction form
    18,703.46/28,066.39 = 7,456.82/x
  3. Step 3: Cross multiply
    18,703.46x = 28,066.39 × 7,456.82
  4. Step 4: Simplify right side
    18,703.46x = 209,285,868.55
  5. Step 5: Solve for x
    x = 209,285,868.55/18,703.46
  6. Step 6: Final answer
    x = 11,189.69

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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.