Home / 19,920.80-27,491.06-11,422.91

Finding the Fourth Proportional to 19,920.80, 27,491.06 and 11,422.91

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Solution

The fourth proportional to 19,920.80, 27,491.06 and 11,422.91 is: 15,763.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.80 : 27,491.06 = 11,422.91 : x
  2. Step 2: Convert to fraction form
    19,920.80/27,491.06 = 11,422.91/x
  3. Step 3: Cross multiply
    19,920.80x = 27,491.06 × 11,422.91
  4. Step 4: Simplify right side
    19,920.80x = 314,027,847.07
  5. Step 5: Solve for x
    x = 314,027,847.07/19,920.80
  6. Step 6: Final answer
    x = 15,763.82

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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.