Home / 19,920.90-27,490.41-11,424.54

Finding the Fourth Proportional to 19,920.90, 27,490.41 and 11,424.54

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Solution

The fourth proportional to 19,920.90, 27,490.41 and 11,424.54 is: 15,765.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.90 : 27,490.41 = 11,424.54 : x
  2. Step 2: Convert to fraction form
    19,920.90/27,490.41 = 11,424.54/x
  3. Step 3: Cross multiply
    19,920.90x = 27,490.41 × 11,424.54
  4. Step 4: Simplify right side
    19,920.90x = 314,065,288.66
  5. Step 5: Solve for x
    x = 314,065,288.66/19,920.90
  6. Step 6: Final answer
    x = 15,765.62

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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.