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Finding the Fourth Proportional to 15,103.90, 20,843.04 and 8,389.14

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Solution

The fourth proportional to 15,103.90, 20,843.04 and 8,389.14 is: 11,576.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,103.90 : 20,843.04 = 8,389.14 : x
  2. Step 2: Convert to fraction form
    15,103.90/20,843.04 = 8,389.14/x
  3. Step 3: Cross multiply
    15,103.90x = 20,843.04 × 8,389.14
  4. Step 4: Simplify right side
    15,103.90x = 174,855,180.59
  5. Step 5: Solve for x
    x = 174,855,180.59/15,103.90
  6. Step 6: Final answer
    x = 11,576.82

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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.