Home / 20,789.10-28,688.94-11,357.66

Finding the Fourth Proportional to 20,789.10, 28,688.94 and 11,357.66

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Solution

The fourth proportional to 20,789.10, 28,688.94 and 11,357.66 is: 15,673.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.10 : 28,688.94 = 11,357.66 : x
  2. Step 2: Convert to fraction form
    20,789.10/28,688.94 = 11,357.66/x
  3. Step 3: Cross multiply
    20,789.10x = 28,688.94 × 11,357.66
  4. Step 4: Simplify right side
    20,789.10x = 325,839,226.28
  5. Step 5: Solve for x
    x = 325,839,226.28/20,789.10
  6. Step 6: Final answer
    x = 15,673.56

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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.