Home / 21,195.28-31,786.86-8,545

Finding the Fourth Proportional to 21,195.28, 31,786.86 and 8,545

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Solution

The fourth proportional to 21,195.28, 31,786.86 and 8,545 is: 12,815.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.28 : 31,786.86 = 8,545 : x
  2. Step 2: Convert to fraction form
    21,195.28/31,786.86 = 8,545/x
  3. Step 3: Cross multiply
    21,195.28x = 31,786.86 × 8,545
  4. Step 4: Simplify right side
    21,195.28x = 271,618,718.70
  5. Step 5: Solve for x
    x = 271,618,718.70/21,195.28
  6. Step 6: Final answer
    x = 12,815.06

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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.