Home / 31,121.39-42,947.43-16,974.23

Finding the Fourth Proportional to 31,121.39, 42,947.43 and 16,974.23

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Solution

The fourth proportional to 31,121.39, 42,947.43 and 16,974.23 is: 23,424.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.39 : 42,947.43 = 16,974.23 : x
  2. Step 2: Convert to fraction form
    31,121.39/42,947.43 = 16,974.23/x
  3. Step 3: Cross multiply
    31,121.39x = 42,947.43 × 16,974.23
  4. Step 4: Simplify right side
    31,121.39x = 728,999,554.73
  5. Step 5: Solve for x
    x = 728,999,554.73/31,121.39
  6. Step 6: Final answer
    x = 23,424.39

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Half scale
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Double scale
Find fourth proportional to 31,122.39, 42,948.81 and 16,975.23
Similar ratio
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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.