Home / 20,660.23-28,511.25-11,228.77

Finding the Fourth Proportional to 20,660.23, 28,511.25 and 11,228.77

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Solution

The fourth proportional to 20,660.23, 28,511.25 and 11,228.77 is: 15,495.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.23 : 28,511.25 = 11,228.77 : x
  2. Step 2: Convert to fraction form
    20,660.23/28,511.25 = 11,228.77/x
  3. Step 3: Cross multiply
    20,660.23x = 28,511.25 × 11,228.77
  4. Step 4: Simplify right side
    20,660.23x = 320,146,268.66
  5. Step 5: Solve for x
    x = 320,146,268.66/20,660.23
  6. Step 6: Final answer
    x = 15,495.77

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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.