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Finding the Fourth Proportional to 18,903.17, 28,354.83 and 7,658.73

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Solution

The fourth proportional to 18,903.17, 28,354.83 and 7,658.73 is: 11,488.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.17 : 28,354.83 = 7,658.73 : x
  2. Step 2: Convert to fraction form
    18,903.17/28,354.83 = 7,658.73/x
  3. Step 3: Cross multiply
    18,903.17x = 28,354.83 × 7,658.73
  4. Step 4: Simplify right side
    18,903.17x = 217,161,987.17
  5. Step 5: Solve for x
    x = 217,161,987.17/18,903.17
  6. Step 6: Final answer
    x = 11,488.13

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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.