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Finding the Fourth Proportional to 18,699.05, 28,053.89 and 7,613.69

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Solution

The fourth proportional to 18,699.05, 28,053.89 and 7,613.69 is: 11,422.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.05 : 28,053.89 = 7,613.69 : x
  2. Step 2: Convert to fraction form
    18,699.05/28,053.89 = 7,613.69/x
  3. Step 3: Cross multiply
    18,699.05x = 28,053.89 × 7,613.69
  4. Step 4: Simplify right side
    18,699.05x = 213,593,710.92
  5. Step 5: Solve for x
    x = 213,593,710.92/18,699.05
  6. Step 6: Final answer
    x = 11,422.70

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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.