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Finding the Fourth Proportional to 18,658.28, 28,018.62 and 11,654.60

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Solution

The fourth proportional to 18,658.28, 28,018.62 and 11,654.60 is: 17,501.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,658.28 : 28,018.62 = 11,654.60 : x
  2. Step 2: Convert to fraction form
    18,658.28/28,018.62 = 11,654.60/x
  3. Step 3: Cross multiply
    18,658.28x = 28,018.62 × 11,654.60
  4. Step 4: Simplify right side
    18,658.28x = 326,545,808.65
  5. Step 5: Solve for x
    x = 326,545,808.65/18,658.28
  6. Step 6: Final answer
    x = 17,501.39

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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.