Home / 15,786.57-21,787.07-13,555.83

Finding the Fourth Proportional to 15,786.57, 21,787.07 and 13,555.83

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Solution

The fourth proportional to 15,786.57, 21,787.07 and 13,555.83 is: 18,708.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,786.57 : 21,787.07 = 13,555.83 : x
  2. Step 2: Convert to fraction form
    15,786.57/21,787.07 = 13,555.83/x
  3. Step 3: Cross multiply
    15,786.57x = 21,787.07 × 13,555.83
  4. Step 4: Simplify right side
    15,786.57x = 295,341,749.34
  5. Step 5: Solve for x
    x = 295,341,749.34/15,786.57
  6. Step 6: Final answer
    x = 18,708.42

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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.