Home / 13,720.28-20,578.31-4,359.09

Finding the Fourth Proportional to 13,720.28, 20,578.31 and 4,359.09

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Solution

The fourth proportional to 13,720.28, 20,578.31 and 4,359.09 is: 6,537.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.28 : 20,578.31 = 4,359.09 : x
  2. Step 2: Convert to fraction form
    13,720.28/20,578.31 = 4,359.09/x
  3. Step 3: Cross multiply
    13,720.28x = 20,578.31 × 4,359.09
  4. Step 4: Simplify right side
    13,720.28x = 89,702,613.34
  5. Step 5: Solve for x
    x = 89,702,613.34/13,720.28
  6. Step 6: Final answer
    x = 6,537.96

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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.