Home / 13,320.54-19,980.85-3,459.90

Finding the Fourth Proportional to 13,320.54, 19,980.85 and 3,459.90

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Solution

The fourth proportional to 13,320.54, 19,980.85 and 3,459.90 is: 5,189.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.54 : 19,980.85 = 3,459.90 : x
  2. Step 2: Convert to fraction form
    13,320.54/19,980.85 = 3,459.90/x
  3. Step 3: Cross multiply
    13,320.54x = 19,980.85 × 3,459.90
  4. Step 4: Simplify right side
    13,320.54x = 69,131,742.92
  5. Step 5: Solve for x
    x = 69,131,742.92/13,320.54
  6. Step 6: Final answer
    x = 5,189.86

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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.