Home / 21,857.92-30,159.30-13,897.24

Finding the Fourth Proportional to 21,857.92, 30,159.30 and 13,897.24

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Solution

The fourth proportional to 21,857.92, 30,159.30 and 13,897.24 is: 19,175.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,857.92 : 30,159.30 = 13,897.24 : x
  2. Step 2: Convert to fraction form
    21,857.92/30,159.30 = 13,897.24/x
  3. Step 3: Cross multiply
    21,857.92x = 30,159.30 × 13,897.24
  4. Step 4: Simplify right side
    21,857.92x = 419,131,030.33
  5. Step 5: Solve for x
    x = 419,131,030.33/21,857.92
  6. Step 6: Final answer
    x = 19,175.25

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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.