Home / 19,787.20-27,309.56-11,408.56

Finding the Fourth Proportional to 19,787.20, 27,309.56 and 11,408.56

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Solution

The fourth proportional to 19,787.20, 27,309.56 and 11,408.56 is: 15,745.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,787.20 : 27,309.56 = 11,408.56 : x
  2. Step 2: Convert to fraction form
    19,787.20/27,309.56 = 11,408.56/x
  3. Step 3: Cross multiply
    19,787.20x = 27,309.56 × 11,408.56
  4. Step 4: Simplify right side
    19,787.20x = 311,562,753.83
  5. Step 5: Solve for x
    x = 311,562,753.83/19,787.20
  6. Step 6: Final answer
    x = 15,745.67

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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.