Home / 12,787.29-17,640.23-11,015.82

Finding the Fourth Proportional to 12,787.29, 17,640.23 and 11,015.82

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Solution

The fourth proportional to 12,787.29, 17,640.23 and 11,015.82 is: 15,196.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.29 : 17,640.23 = 11,015.82 : x
  2. Step 2: Convert to fraction form
    12,787.29/17,640.23 = 11,015.82/x
  3. Step 3: Cross multiply
    12,787.29x = 17,640.23 × 11,015.82
  4. Step 4: Simplify right side
    12,787.29x = 194,321,543.36
  5. Step 5: Solve for x
    x = 194,321,543.36/12,787.29
  6. Step 6: Final answer
    x = 15,196.46

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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.