Home / 19,865.90-27,420.45-11,372.78

Finding the Fourth Proportional to 19,865.90, 27,420.45 and 11,372.78

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Solution

The fourth proportional to 19,865.90, 27,420.45 and 11,372.78 is: 15,697.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,865.90 : 27,420.45 = 11,372.78 : x
  2. Step 2: Convert to fraction form
    19,865.90/27,420.45 = 11,372.78/x
  3. Step 3: Cross multiply
    19,865.90x = 27,420.45 × 11,372.78
  4. Step 4: Simplify right side
    19,865.90x = 311,846,745.35
  5. Step 5: Solve for x
    x = 311,846,745.35/19,865.90
  6. Step 6: Final answer
    x = 15,697.59

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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.