Home / 20,942.42-28,901.14-11,990.84

Finding the Fourth Proportional to 20,942.42, 28,901.14 and 11,990.84

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Solution

The fourth proportional to 20,942.42, 28,901.14 and 11,990.84 is: 16,547.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.42 : 28,901.14 = 11,990.84 : x
  2. Step 2: Convert to fraction form
    20,942.42/28,901.14 = 11,990.84/x
  3. Step 3: Cross multiply
    20,942.42x = 28,901.14 × 11,990.84
  4. Step 4: Simplify right side
    20,942.42x = 346,548,945.56
  5. Step 5: Solve for x
    x = 346,548,945.56/20,942.42
  6. Step 6: Final answer
    x = 16,547.70

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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.