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Finding the Fourth Proportional to 15,103.88, 20,844.98 and 9,138.83

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Solution

The fourth proportional to 15,103.88, 20,844.98 and 9,138.83 is: 12,612.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,103.88 : 20,844.98 = 9,138.83 : x
  2. Step 2: Convert to fraction form
    15,103.88/20,844.98 = 9,138.83/x
  3. Step 3: Cross multiply
    15,103.88x = 20,844.98 × 9,138.83
  4. Step 4: Simplify right side
    15,103.88x = 190,498,682.88
  5. Step 5: Solve for x
    x = 190,498,682.88/15,103.88
  6. Step 6: Final answer
    x = 12,612.57

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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.