Home / 20,739.69-28,620.68-11,787.57

Finding the Fourth Proportional to 20,739.69, 28,620.68 and 11,787.57

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Solution

The fourth proportional to 20,739.69, 28,620.68 and 11,787.57 is: 16,266.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.69 : 28,620.68 = 11,787.57 : x
  2. Step 2: Convert to fraction form
    20,739.69/28,620.68 = 11,787.57/x
  3. Step 3: Cross multiply
    20,739.69x = 28,620.68 × 11,787.57
  4. Step 4: Simplify right side
    20,739.69x = 337,368,210.01
  5. Step 5: Solve for x
    x = 337,368,210.01/20,739.69
  6. Step 6: Final answer
    x = 16,266.79

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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.