Home / 21,620.40-29,832.30-12,188.95

Finding the Fourth Proportional to 21,620.40, 29,832.30 and 12,188.95

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Solution

The fourth proportional to 21,620.40, 29,832.30 and 12,188.95 is: 16,818.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.40 : 29,832.30 = 12,188.95 : x
  2. Step 2: Convert to fraction form
    21,620.40/29,832.30 = 12,188.95/x
  3. Step 3: Cross multiply
    21,620.40x = 29,832.30 × 12,188.95
  4. Step 4: Simplify right side
    21,620.40x = 363,624,413.09
  5. Step 5: Solve for x
    x = 363,624,413.09/21,620.40
  6. Step 6: Final answer
    x = 16,818.58

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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.