Home / 21,990.26-30,346.16-12,557.54

Finding the Fourth Proportional to 21,990.26, 30,346.16 and 12,557.54

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Solution

The fourth proportional to 21,990.26, 30,346.16 and 12,557.54 is: 17,329.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.26 : 30,346.16 = 12,557.54 : x
  2. Step 2: Convert to fraction form
    21,990.26/30,346.16 = 12,557.54/x
  3. Step 3: Cross multiply
    21,990.26x = 30,346.16 × 12,557.54
  4. Step 4: Simplify right side
    21,990.26x = 381,073,118.05
  5. Step 5: Solve for x
    x = 381,073,118.05/21,990.26
  6. Step 6: Final answer
    x = 17,329.18

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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.