Home / 20,909.44-31,372.93-13,018.56

Finding the Fourth Proportional to 20,909.44, 31,372.93 and 13,018.56

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Solution

The fourth proportional to 20,909.44, 31,372.93 and 13,018.56 is: 19,533.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.44 : 31,372.93 = 13,018.56 : x
  2. Step 2: Convert to fraction form
    20,909.44/31,372.93 = 13,018.56/x
  3. Step 3: Cross multiply
    20,909.44x = 31,372.93 × 13,018.56
  4. Step 4: Simplify right side
    20,909.44x = 408,430,371.58
  5. Step 5: Solve for x
    x = 408,430,371.58/20,909.44
  6. Step 6: Final answer
    x = 19,533.30

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1.5x scale

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.