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Finding the Fourth Proportional to 40,636.70, 60,906.45 and 20,905.10

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Solution

The fourth proportional to 40,636.70, 60,906.45 and 20,905.10 is: 31,332.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,636.70 : 60,906.45 = 20,905.10 : x
  2. Step 2: Convert to fraction form
    40,636.70/60,906.45 = 20,905.10/x
  3. Step 3: Cross multiply
    40,636.70x = 60,906.45 × 20,905.10
  4. Step 4: Simplify right side
    40,636.70x = 1,273,255,427.90
  5. Step 5: Solve for x
    x = 1,273,255,427.90/40,636.70
  6. Step 6: Final answer
    x = 31,332.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.