Home / 19,664.20-27,171.14-15,717.88

Finding the Fourth Proportional to 19,664.20, 27,171.14 and 15,717.88

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Solution

The fourth proportional to 19,664.20, 27,171.14 and 15,717.88 is: 21,718.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,664.20 : 27,171.14 = 15,717.88 : x
  2. Step 2: Convert to fraction form
    19,664.20/27,171.14 = 15,717.88/x
  3. Step 3: Cross multiply
    19,664.20x = 27,171.14 × 15,717.88
  4. Step 4: Simplify right side
    19,664.20x = 427,072,717.98
  5. Step 5: Solve for x
    x = 427,072,717.98/19,664.20
  6. Step 6: Final answer
    x = 21,718.29

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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.