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Finding the Fourth Proportional to 8,590.98, 12,886.90 and 2,671.90

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Solution

The fourth proportional to 8,590.98, 12,886.90 and 2,671.90 is: 4,007.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,590.98 : 12,886.90 = 2,671.90 : x
  2. Step 2: Convert to fraction form
    8,590.98/12,886.90 = 2,671.90/x
  3. Step 3: Cross multiply
    8,590.98x = 12,886.90 × 2,671.90
  4. Step 4: Simplify right side
    8,590.98x = 34,432,487.34
  5. Step 5: Solve for x
    x = 34,432,487.34/8,590.98
  6. Step 6: Final answer
    x = 4,007.98

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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.