Home / 19,890.36-27,460.80-13,181.76

Finding the Fourth Proportional to 19,890.36, 27,460.80 and 13,181.76

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Solution

The fourth proportional to 19,890.36, 27,460.80 and 13,181.76 is: 18,198.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.36 : 27,460.80 = 13,181.76 : x
  2. Step 2: Convert to fraction form
    19,890.36/27,460.80 = 13,181.76/x
  3. Step 3: Cross multiply
    19,890.36x = 27,460.80 × 13,181.76
  4. Step 4: Simplify right side
    19,890.36x = 361,981,675.01
  5. Step 5: Solve for x
    x = 361,981,675.01/19,890.36
  6. Step 6: Final answer
    x = 18,198.85

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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.