Home / 13,720.20-20,559.26-7,148.52

Finding the Fourth Proportional to 13,720.20, 20,559.26 and 7,148.52

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Solution

The fourth proportional to 13,720.20, 20,559.26 and 7,148.52 is: 10,711.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.20 : 20,559.26 = 7,148.52 : x
  2. Step 2: Convert to fraction form
    13,720.20/20,559.26 = 7,148.52/x
  3. Step 3: Cross multiply
    13,720.20x = 20,559.26 × 7,148.52
  4. Step 4: Simplify right side
    13,720.20x = 146,968,281.30
  5. Step 5: Solve for x
    x = 146,968,281.30/13,720.20
  6. Step 6: Final answer
    x = 10,711.82

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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.