Home / 13,779.50-20,669.25-3,391.25

Finding the Fourth Proportional to 13,779.50, 20,669.25 and 3,391.25

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Solution

The fourth proportional to 13,779.50, 20,669.25 and 3,391.25 is: 5,086.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.50 : 20,669.25 = 3,391.25 : x
  2. Step 2: Convert to fraction form
    13,779.50/20,669.25 = 3,391.25/x
  3. Step 3: Cross multiply
    13,779.50x = 20,669.25 × 3,391.25
  4. Step 4: Simplify right side
    13,779.50x = 70,094,594.06
  5. Step 5: Solve for x
    x = 70,094,594.06/13,779.50
  6. Step 6: Final answer
    x = 5,086.88

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Similar ratio
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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.