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Finding the Fourth Proportional to 36,989.76, 55,473.12 and 12,360

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Solution

The fourth proportional to 36,989.76, 55,473.12 and 12,360 is: 18,536.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,989.76 : 55,473.12 = 12,360 : x
  2. Step 2: Convert to fraction form
    36,989.76/55,473.12 = 12,360/x
  3. Step 3: Cross multiply
    36,989.76x = 55,473.12 × 12,360
  4. Step 4: Simplify right side
    36,989.76x = 685,647,763.20
  5. Step 5: Solve for x
    x = 685,647,763.20/36,989.76
  6. Step 6: Final answer
    x = 18,536.15

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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.