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Finding the Fourth Proportional to 29,720.50, 41,018.48 and 18,393.64

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Solution

The fourth proportional to 29,720.50, 41,018.48 and 18,393.64 is: 25,385.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,720.50 : 41,018.48 = 18,393.64 : x
  2. Step 2: Convert to fraction form
    29,720.50/41,018.48 = 18,393.64/x
  3. Step 3: Cross multiply
    29,720.50x = 41,018.48 × 18,393.64
  4. Step 4: Simplify right side
    29,720.50x = 754,479,363.12
  5. Step 5: Solve for x
    x = 754,479,363.12/29,720.50
  6. Step 6: Final answer
    x = 25,385.83

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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.