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Finding the Fourth Proportional to 15,103.67, 20,844.71 and 9,138.63

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Solution

The fourth proportional to 15,103.67, 20,844.71 and 9,138.63 is: 12,612.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,103.67 : 20,844.71 = 9,138.63 : x
  2. Step 2: Convert to fraction form
    15,103.67/20,844.71 = 9,138.63/x
  3. Step 3: Cross multiply
    15,103.67x = 20,844.71 × 9,138.63
  4. Step 4: Simplify right side
    15,103.67x = 190,492,092.15
  5. Step 5: Solve for x
    x = 190,492,092.15/15,103.67
  6. Step 6: Final answer
    x = 12,612.30

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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.