Home / 21,838.14-30,134.84-12,886.02

Finding the Fourth Proportional to 21,838.14, 30,134.84 and 12,886.02

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Solution

The fourth proportional to 21,838.14, 30,134.84 and 12,886.02 is: 17,781.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,838.14 : 30,134.84 = 12,886.02 : x
  2. Step 2: Convert to fraction form
    21,838.14/30,134.84 = 12,886.02/x
  3. Step 3: Cross multiply
    21,838.14x = 30,134.84 × 12,886.02
  4. Step 4: Simplify right side
    21,838.14x = 388,318,086.51
  5. Step 5: Solve for x
    x = 388,318,086.51/21,838.14
  6. Step 6: Final answer
    x = 17,781.65

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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.