Home / 19,920.87-27,486.86-11,425.73

Finding the Fourth Proportional to 19,920.87, 27,486.86 and 11,425.73

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Solution

The fourth proportional to 19,920.87, 27,486.86 and 11,425.73 is: 15,765.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.87 : 27,486.86 = 11,425.73 : x
  2. Step 2: Convert to fraction form
    19,920.87/27,486.86 = 11,425.73/x
  3. Step 3: Cross multiply
    19,920.87x = 27,486.86 × 11,425.73
  4. Step 4: Simplify right side
    19,920.87x = 314,057,246.34
  5. Step 5: Solve for x
    x = 314,057,246.34/19,920.87
  6. Step 6: Final answer
    x = 15,765.24

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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.