Home / 20,439.54-28,190.37-13,261.62

Finding the Fourth Proportional to 20,439.54, 28,190.37 and 13,261.62

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Solution

The fourth proportional to 20,439.54, 28,190.37 and 13,261.62 is: 18,290.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.54 : 28,190.37 = 13,261.62 : x
  2. Step 2: Convert to fraction form
    20,439.54/28,190.37 = 13,261.62/x
  3. Step 3: Cross multiply
    20,439.54x = 28,190.37 × 13,261.62
  4. Step 4: Simplify right side
    20,439.54x = 373,849,974.60
  5. Step 5: Solve for x
    x = 373,849,974.60/20,439.54
  6. Step 6: Final answer
    x = 18,290.53

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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.