Home / 13,789.53-20,680.89-6,386.88

Finding the Fourth Proportional to 13,789.53, 20,680.89 and 6,386.88

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Solution

The fourth proportional to 13,789.53, 20,680.89 and 6,386.88 is: 9,578.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,789.53 : 20,680.89 = 6,386.88 : x
  2. Step 2: Convert to fraction form
    13,789.53/20,680.89 = 6,386.88/x
  3. Step 3: Cross multiply
    13,789.53x = 20,680.89 × 6,386.88
  4. Step 4: Simplify right side
    13,789.53x = 132,086,362.72
  5. Step 5: Solve for x
    x = 132,086,362.72/13,789.53
  6. Step 6: Final answer
    x = 9,578.74

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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.