Home / 20,972.65-28,942.04-11,899.68

Finding the Fourth Proportional to 20,972.65, 28,942.04 and 11,899.68

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Solution

The fourth proportional to 20,972.65, 28,942.04 and 11,899.68 is: 16,421.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.65 : 28,942.04 = 11,899.68 : x
  2. Step 2: Convert to fraction form
    20,972.65/28,942.04 = 11,899.68/x
  3. Step 3: Cross multiply
    20,972.65x = 28,942.04 × 11,899.68
  4. Step 4: Simplify right side
    20,972.65x = 344,400,955.05
  5. Step 5: Solve for x
    x = 344,400,955.05/20,972.65
  6. Step 6: Final answer
    x = 16,421.44

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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.