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Finding the Fourth Proportional to 37,670.60, 51,988.50 and 20,909

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Solution

The fourth proportional to 37,670.60, 51,988.50 and 20,909 is: 28,856.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,670.60 : 51,988.50 = 20,909 : x
  2. Step 2: Convert to fraction form
    37,670.60/51,988.50 = 20,909/x
  3. Step 3: Cross multiply
    37,670.60x = 51,988.50 × 20,909
  4. Step 4: Simplify right side
    37,670.60x = 1,087,027,546.50
  5. Step 5: Solve for x
    x = 1,087,027,546.50/37,670.60
  6. Step 6: Final answer
    x = 28,856.13

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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.