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Finding the Fourth Proportional to 7,855.53, 11,781.95 and 2,590.61

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Solution

The fourth proportional to 7,855.53, 11,781.95 and 2,590.61 is: 3,885.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,855.53 : 11,781.95 = 2,590.61 : x
  2. Step 2: Convert to fraction form
    7,855.53/11,781.95 = 2,590.61/x
  3. Step 3: Cross multiply
    7,855.53x = 11,781.95 × 2,590.61
  4. Step 4: Simplify right side
    7,855.53x = 30,522,365.63
  5. Step 5: Solve for x
    x = 30,522,365.63/7,855.53
  6. Step 6: Final answer
    x = 3,885.46

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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.