Home / 21,905.75-30,229.98-12,474.32

Finding the Fourth Proportional to 21,905.75, 30,229.98 and 12,474.32

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Solution

The fourth proportional to 21,905.75, 30,229.98 and 12,474.32 is: 17,214.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.75 : 30,229.98 = 12,474.32 : x
  2. Step 2: Convert to fraction form
    21,905.75/30,229.98 = 12,474.32/x
  3. Step 3: Cross multiply
    21,905.75x = 30,229.98 × 12,474.32
  4. Step 4: Simplify right side
    21,905.75x = 377,098,444.11
  5. Step 5: Solve for x
    x = 377,098,444.11/21,905.75
  6. Step 6: Final answer
    x = 17,214.59

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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.