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Finding the Fourth Proportional to 37,287.78, 51,457.11 and 20,520.78

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Solution

The fourth proportional to 37,287.78, 51,457.11 and 20,520.78 is: 28,318.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,287.78 : 51,457.11 = 20,520.78 : x
  2. Step 2: Convert to fraction form
    37,287.78/51,457.11 = 20,520.78/x
  3. Step 3: Cross multiply
    37,287.78x = 51,457.11 × 20,520.78
  4. Step 4: Simplify right side
    37,287.78x = 1,055,940,033.75
  5. Step 5: Solve for x
    x = 1,055,940,033.75/37,287.78
  6. Step 6: Final answer
    x = 28,318.66

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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.