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Finding the Fourth Proportional to 15,138.90, 22,708.35 and 11,682.90

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Solution

The fourth proportional to 15,138.90, 22,708.35 and 11,682.90 is: 17,524.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,138.90 : 22,708.35 = 11,682.90 : x
  2. Step 2: Convert to fraction form
    15,138.90/22,708.35 = 11,682.90/x
  3. Step 3: Cross multiply
    15,138.90x = 22,708.35 × 11,682.90
  4. Step 4: Simplify right side
    15,138.90x = 265,299,382.22
  5. Step 5: Solve for x
    x = 265,299,382.22/15,138.90
  6. Step 6: Final answer
    x = 17,524.35

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1.5x scale

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.