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Finding the Fourth Proportional to 39,578.94, 59,382.92 and 20,858.22

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Solution

The fourth proportional to 39,578.94, 59,382.92 and 20,858.22 is: 31,294.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,578.94 : 59,382.92 = 20,858.22 : x
  2. Step 2: Convert to fraction form
    39,578.94/59,382.92 = 20,858.22/x
  3. Step 3: Cross multiply
    39,578.94x = 59,382.92 × 20,858.22
  4. Step 4: Simplify right side
    39,578.94x = 1,238,622,061.75
  5. Step 5: Solve for x
    x = 1,238,622,061.75/39,578.94
  6. Step 6: Final answer
    x = 31,294.98

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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.