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Finding the Fourth Proportional to 51,998.71, 78,007.79 and 20,836.39

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Solution

The fourth proportional to 51,998.71, 78,007.79 and 20,836.39 is: 31,258.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,998.71 : 78,007.79 = 20,836.39 : x
  2. Step 2: Convert to fraction form
    51,998.71/78,007.79 = 20,836.39/x
  3. Step 3: Cross multiply
    51,998.71x = 78,007.79 × 20,836.39
  4. Step 4: Simplify right side
    51,998.71x = 1,625,400,735.48
  5. Step 5: Solve for x
    x = 1,625,400,735.48/51,998.71
  6. Step 6: Final answer
    x = 31,258.48

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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.