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Finding the Fourth Proportional to 15,103.10, 20,839.74 and 9,134.48

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Solution

The fourth proportional to 15,103.10, 20,839.74 and 9,134.48 is: 12,604.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,103.10 : 20,839.74 = 9,134.48 : x
  2. Step 2: Convert to fraction form
    15,103.10/20,839.74 = 9,134.48/x
  3. Step 3: Cross multiply
    15,103.10x = 20,839.74 × 9,134.48
  4. Step 4: Simplify right side
    15,103.10x = 190,360,188.24
  5. Step 5: Solve for x
    x = 190,360,188.24/15,103.10
  6. Step 6: Final answer
    x = 12,604.05

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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.