Home / 20,942.70-28,899.90-11,511.06

Finding the Fourth Proportional to 20,942.70, 28,899.90 and 11,511.06

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Solution

The fourth proportional to 20,942.70, 28,899.90 and 11,511.06 is: 15,884.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.70 : 28,899.90 = 11,511.06 : x
  2. Step 2: Convert to fraction form
    20,942.70/28,899.90 = 11,511.06/x
  3. Step 3: Cross multiply
    20,942.70x = 28,899.90 × 11,511.06
  4. Step 4: Simplify right side
    20,942.70x = 332,668,482.89
  5. Step 5: Solve for x
    x = 332,668,482.89/20,942.70
  6. Step 6: Final answer
    x = 15,884.70

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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.