Home / 20,942.88-28,901.10-11,990.22

Finding the Fourth Proportional to 20,942.88, 28,901.10 and 11,990.22

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Solution

The fourth proportional to 20,942.88, 28,901.10 and 11,990.22 is: 16,546.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.88 : 28,901.10 = 11,990.22 : x
  2. Step 2: Convert to fraction form
    20,942.88/28,901.10 = 11,990.22/x
  3. Step 3: Cross multiply
    20,942.88x = 28,901.10 × 11,990.22
  4. Step 4: Simplify right side
    20,942.88x = 346,530,547.24
  5. Step 5: Solve for x
    x = 346,530,547.24/20,942.88
  6. Step 6: Final answer
    x = 16,546.46

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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.