Home / 13,699.72-20,549.70-3,311.56

Finding the Fourth Proportional to 13,699.72, 20,549.70 and 3,311.56

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Solution

The fourth proportional to 13,699.72, 20,549.70 and 3,311.56 is: 4,967.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,699.72 : 20,549.70 = 3,311.56 : x
  2. Step 2: Convert to fraction form
    13,699.72/20,549.70 = 3,311.56/x
  3. Step 3: Cross multiply
    13,699.72x = 20,549.70 × 3,311.56
  4. Step 4: Simplify right side
    13,699.72x = 68,051,564.53
  5. Step 5: Solve for x
    x = 68,051,564.53/13,699.72
  6. Step 6: Final answer
    x = 4,967.37

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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.