Home / 11,391.82-15,721.08-6,611.40

Finding the Fourth Proportional to 11,391.82, 15,721.08 and 6,611.40

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Solution

The fourth proportional to 11,391.82, 15,721.08 and 6,611.40 is: 9,123.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,391.82 : 15,721.08 = 6,611.40 : x
  2. Step 2: Convert to fraction form
    11,391.82/15,721.08 = 6,611.40/x
  3. Step 3: Cross multiply
    11,391.82x = 15,721.08 × 6,611.40
  4. Step 4: Simplify right side
    11,391.82x = 103,938,348.31
  5. Step 5: Solve for x
    x = 103,938,348.31/11,391.82
  6. Step 6: Final answer
    x = 9,123.95

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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.