Home / 20,660.31-28,511.55-11,228.90

Finding the Fourth Proportional to 20,660.31, 28,511.55 and 11,228.90

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Solution

The fourth proportional to 20,660.31, 28,511.55 and 11,228.90 is: 15,496.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.31 : 28,511.55 = 11,228.90 : x
  2. Step 2: Convert to fraction form
    20,660.31/28,511.55 = 11,228.90/x
  3. Step 3: Cross multiply
    20,660.31x = 28,511.55 × 11,228.90
  4. Step 4: Simplify right side
    20,660.31x = 320,153,201.24
  5. Step 5: Solve for x
    x = 320,153,201.24/20,660.31
  6. Step 6: Final answer
    x = 15,496.05

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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.