Home / 21,839.10-30,137.94-12,886.62

Finding the Fourth Proportional to 21,839.10, 30,137.94 and 12,886.62

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Solution

The fourth proportional to 21,839.10, 30,137.94 and 12,886.62 is: 17,783.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,839.10 : 30,137.94 = 12,886.62 : x
  2. Step 2: Convert to fraction form
    21,839.10/30,137.94 = 12,886.62/x
  3. Step 3: Cross multiply
    21,839.10x = 30,137.94 × 12,886.62
  4. Step 4: Simplify right side
    21,839.10x = 388,376,180.36
  5. Step 5: Solve for x
    x = 388,376,180.36/21,839.10
  6. Step 6: Final answer
    x = 17,783.52

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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.