Home / 13,787.74-20,698.49-9,111.61

Finding the Fourth Proportional to 13,787.74, 20,698.49 and 9,111.61

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Solution

The fourth proportional to 13,787.74, 20,698.49 and 9,111.61 is: 13,678.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,787.74 : 20,698.49 = 9,111.61 : x
  2. Step 2: Convert to fraction form
    13,787.74/20,698.49 = 9,111.61/x
  3. Step 3: Cross multiply
    13,787.74x = 20,698.49 × 9,111.61
  4. Step 4: Simplify right side
    13,787.74x = 188,596,568.47
  5. Step 5: Solve for x
    x = 188,596,568.47/13,787.74
  6. Step 6: Final answer
    x = 13,678.57

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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.