Home / 21,887.40-30,135.36-19,891.92

Finding the Fourth Proportional to 21,887.40, 30,135.36 and 19,891.92

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Solution

The fourth proportional to 21,887.40, 30,135.36 and 19,891.92 is: 27,387.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,887.40 : 30,135.36 = 19,891.92 : x
  2. Step 2: Convert to fraction form
    21,887.40/30,135.36 = 19,891.92/x
  3. Step 3: Cross multiply
    21,887.40x = 30,135.36 × 19,891.92
  4. Step 4: Simplify right side
    21,887.40x = 599,450,170.29
  5. Step 5: Solve for x
    x = 599,450,170.29/21,887.40
  6. Step 6: Final answer
    x = 27,387.91

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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.