Home / 15,680.06-21,625.80-13,787.70

Finding the Fourth Proportional to 15,680.06, 21,625.80 and 13,787.70

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Solution

The fourth proportional to 15,680.06, 21,625.80 and 13,787.70 is: 19,015.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,680.06 : 21,625.80 = 13,787.70 : x
  2. Step 2: Convert to fraction form
    15,680.06/21,625.80 = 13,787.70/x
  3. Step 3: Cross multiply
    15,680.06x = 21,625.80 × 13,787.70
  4. Step 4: Simplify right side
    15,680.06x = 298,170,042.66
  5. Step 5: Solve for x
    x = 298,170,042.66/15,680.06
  6. Step 6: Final answer
    x = 19,015.87

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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.