Home / 21,843.12-30,146.94-13,888.92

Finding the Fourth Proportional to 21,843.12, 30,146.94 and 13,888.92

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Solution

The fourth proportional to 21,843.12, 30,146.94 and 13,888.92 is: 19,168.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,843.12 : 30,146.94 = 13,888.92 : x
  2. Step 2: Convert to fraction form
    21,843.12/30,146.94 = 13,888.92/x
  3. Step 3: Cross multiply
    21,843.12x = 30,146.94 × 13,888.92
  4. Step 4: Simplify right side
    21,843.12x = 418,708,437.90
  5. Step 5: Solve for x
    x = 418,708,437.90/21,843.12
  6. Step 6: Final answer
    x = 19,168.89

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Double scale
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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.