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Finding the Fourth Proportional to 18,684.34, 28,027.11 and 7,590.78

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Solution

The fourth proportional to 18,684.34, 28,027.11 and 7,590.78 is: 11,386.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,684.34 : 28,027.11 = 7,590.78 : x
  2. Step 2: Convert to fraction form
    18,684.34/28,027.11 = 7,590.78/x
  3. Step 3: Cross multiply
    18,684.34x = 28,027.11 × 7,590.78
  4. Step 4: Simplify right side
    18,684.34x = 212,747,654.51
  5. Step 5: Solve for x
    x = 212,747,654.51/18,684.34
  6. Step 6: Final answer
    x = 11,386.42

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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.