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Finding the Fourth Proportional to 5,679.79, 7,835.61 and 3,789.58

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Solution

The fourth proportional to 5,679.79, 7,835.61 and 3,789.58 is: 5,227.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.79 : 7,835.61 = 3,789.58 : x
  2. Step 2: Convert to fraction form
    5,679.79/7,835.61 = 3,789.58/x
  3. Step 3: Cross multiply
    5,679.79x = 7,835.61 × 3,789.58
  4. Step 4: Simplify right side
    5,679.79x = 29,693,670.94
  5. Step 5: Solve for x
    x = 29,693,670.94/5,679.79
  6. Step 6: Final answer
    x = 5,227.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.