Home / 20,789.09-28,688.93-11,228.97

Finding the Fourth Proportional to 20,789.09, 28,688.93 and 11,228.97

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Solution

The fourth proportional to 20,789.09, 28,688.93 and 11,228.97 is: 15,495.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.09 : 28,688.93 = 11,228.97 : x
  2. Step 2: Convert to fraction form
    20,789.09/28,688.93 = 11,228.97/x
  3. Step 3: Cross multiply
    20,789.09x = 28,688.93 × 11,228.97
  4. Step 4: Simplify right side
    20,789.09x = 322,147,162.37
  5. Step 5: Solve for x
    x = 322,147,162.37/20,789.09
  6. Step 6: Final answer
    x = 15,495.98

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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.