Home / 21,179.84-31,780.19-14,979.69

Finding the Fourth Proportional to 21,179.84, 31,780.19 and 14,979.69

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Solution

The fourth proportional to 21,179.84, 31,780.19 and 14,979.69 is: 22,476.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.84 : 31,780.19 = 14,979.69 : x
  2. Step 2: Convert to fraction form
    21,179.84/31,780.19 = 14,979.69/x
  3. Step 3: Cross multiply
    21,179.84x = 31,780.19 × 14,979.69
  4. Step 4: Simplify right side
    21,179.84x = 476,057,431.79
  5. Step 5: Solve for x
    x = 476,057,431.79/21,179.84
  6. Step 6: Final answer
    x = 22,476.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.