Home / 20,155.88-27,815.42-11,203.76

Finding the Fourth Proportional to 20,155.88, 27,815.42 and 11,203.76

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Solution

The fourth proportional to 20,155.88, 27,815.42 and 11,203.76 is: 15,461.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.88 : 27,815.42 = 11,203.76 : x
  2. Step 2: Convert to fraction form
    20,155.88/27,815.42 = 11,203.76/x
  3. Step 3: Cross multiply
    20,155.88x = 27,815.42 × 11,203.76
  4. Step 4: Simplify right side
    20,155.88x = 311,637,289.98
  5. Step 5: Solve for x
    x = 311,637,289.98/20,155.88
  6. Step 6: Final answer
    x = 15,461.36

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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.