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Finding the Fourth Proportional to 37,672.50, 51,988.05 and 20,905.86

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Solution

The fourth proportional to 37,672.50, 51,988.05 and 20,905.86 is: 28,850.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,672.50 : 51,988.05 = 20,905.86 : x
  2. Step 2: Convert to fraction form
    37,672.50/51,988.05 = 20,905.86/x
  3. Step 3: Cross multiply
    37,672.50x = 51,988.05 × 20,905.86
  4. Step 4: Simplify right side
    37,672.50x = 1,086,854,894.97
  5. Step 5: Solve for x
    x = 1,086,854,894.97/37,672.50
  6. Step 6: Final answer
    x = 28,850.09

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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.