Home / 13,613.31-20,411.07-5,720.87

Finding the Fourth Proportional to 13,613.31, 20,411.07 and 5,720.87

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Solution

The fourth proportional to 13,613.31, 20,411.07 and 5,720.87 is: 8,577.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.31 : 20,411.07 = 5,720.87 : x
  2. Step 2: Convert to fraction form
    13,613.31/20,411.07 = 5,720.87/x
  3. Step 3: Cross multiply
    13,613.31x = 20,411.07 × 5,720.87
  4. Step 4: Simplify right side
    13,613.31x = 116,768,975.98
  5. Step 5: Solve for x
    x = 116,768,975.98/13,613.31
  6. Step 6: Final answer
    x = 8,577.56

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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.