Home / 21,990.50-30,346.62-11,918.96

Finding the Fourth Proportional to 21,990.50, 30,346.62 and 11,918.96

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Solution

The fourth proportional to 21,990.50, 30,346.62 and 11,918.96 is: 16,448.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.50 : 30,346.62 = 11,918.96 : x
  2. Step 2: Convert to fraction form
    21,990.50/30,346.62 = 11,918.96/x
  3. Step 3: Cross multiply
    21,990.50x = 30,346.62 × 11,918.96
  4. Step 4: Simplify right side
    21,990.50x = 361,700,149.92
  5. Step 5: Solve for x
    x = 361,700,149.92/21,990.50
  6. Step 6: Final answer
    x = 16,448.02

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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.