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Finding the Fourth Proportional to 36,720, 50,685.60 and 21,612.48

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Solution

The fourth proportional to 36,720, 50,685.60 and 21,612.48 is: 29,832.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,720 : 50,685.60 = 21,612.48 : x
  2. Step 2: Convert to fraction form
    36,720/50,685.60 = 21,612.48/x
  3. Step 3: Cross multiply
    36,720x = 50,685.60 × 21,612.48
  4. Step 4: Simplify right side
    36,720x = 1,095,441,516.29
  5. Step 5: Solve for x
    x = 1,095,441,516.29/36,720
  6. Step 6: Final answer
    x = 29,832.29

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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.