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Finding the Fourth Proportional to 37,578.28, 51,858.02 and 20,811.28

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Solution

The fourth proportional to 37,578.28, 51,858.02 and 20,811.28 is: 28,719.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,578.28 : 51,858.02 = 20,811.28 : x
  2. Step 2: Convert to fraction form
    37,578.28/51,858.02 = 20,811.28/x
  3. Step 3: Cross multiply
    37,578.28x = 51,858.02 × 20,811.28
  4. Step 4: Simplify right side
    37,578.28x = 1,079,231,774.47
  5. Step 5: Solve for x
    x = 1,079,231,774.47/37,578.28
  6. Step 6: Final answer
    x = 28,719.56

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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.