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Finding the Fourth Proportional to 28,394.78, 42,590.62 and 8,671.79

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Solution

The fourth proportional to 28,394.78, 42,590.62 and 8,671.79 is: 13,007.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,394.78 : 42,590.62 = 8,671.79 : x
  2. Step 2: Convert to fraction form
    28,394.78/42,590.62 = 8,671.79/x
  3. Step 3: Cross multiply
    28,394.78x = 42,590.62 × 8,671.79
  4. Step 4: Simplify right side
    28,394.78x = 369,337,029.93
  5. Step 5: Solve for x
    x = 369,337,029.93/28,394.78
  6. Step 6: Final answer
    x = 13,007.22

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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.