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Finding the Fourth Proportional to 21,773.70, 30,046.86 and 12,342.60

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Solution

The fourth proportional to 21,773.70, 30,046.86 and 12,342.60 is: 17,032.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,773.70 : 30,046.86 = 12,342.60 : x
  2. Step 2: Convert to fraction form
    21,773.70/30,046.86 = 12,342.60/x
  3. Step 3: Cross multiply
    21,773.70x = 30,046.86 × 12,342.60
  4. Step 4: Simplify right side
    21,773.70x = 370,856,374.24
  5. Step 5: Solve for x
    x = 370,856,374.24/21,773.70
  6. Step 6: Final answer
    x = 17,032.31

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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.