Home / 20,660.14-28,511.05-11,228.74

Finding the Fourth Proportional to 20,660.14, 28,511.05 and 11,228.74

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Solution

The fourth proportional to 20,660.14, 28,511.05 and 11,228.74 is: 15,495.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.14 : 28,511.05 = 11,228.74 : x
  2. Step 2: Convert to fraction form
    20,660.14/28,511.05 = 11,228.74/x
  3. Step 3: Cross multiply
    20,660.14x = 28,511.05 × 11,228.74
  4. Step 4: Simplify right side
    20,660.14x = 320,143,167.58
  5. Step 5: Solve for x
    x = 320,143,167.58/20,660.14
  6. Step 6: Final answer
    x = 15,495.69

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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.