Home / 21,990.75-30,348.32-12,054.75

Finding the Fourth Proportional to 21,990.75, 30,348.32 and 12,054.75

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Solution

The fourth proportional to 21,990.75, 30,348.32 and 12,054.75 is: 16,636.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.75 : 30,348.32 = 12,054.75 : x
  2. Step 2: Convert to fraction form
    21,990.75/30,348.32 = 12,054.75/x
  3. Step 3: Cross multiply
    21,990.75x = 30,348.32 × 12,054.75
  4. Step 4: Simplify right side
    21,990.75x = 365,841,410.52
  5. Step 5: Solve for x
    x = 365,841,410.52/21,990.75
  6. Step 6: Final answer
    x = 16,636.15

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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.