Home / 21,990.24-30,346.50-11,918.50

Finding the Fourth Proportional to 21,990.24, 30,346.50 and 11,918.50

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Solution

The fourth proportional to 21,990.24, 30,346.50 and 11,918.50 is: 16,447.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.24 : 30,346.50 = 11,918.50 : x
  2. Step 2: Convert to fraction form
    21,990.24/30,346.50 = 11,918.50/x
  3. Step 3: Cross multiply
    21,990.24x = 30,346.50 × 11,918.50
  4. Step 4: Simplify right side
    21,990.24x = 361,684,760.25
  5. Step 5: Solve for x
    x = 361,684,760.25/21,990.24
  6. Step 6: Final answer
    x = 16,447.51

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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.