Home / 13,139.10-19,708.10-6,116.70

Finding the Fourth Proportional to 13,139.10, 19,708.10 and 6,116.70

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Solution

The fourth proportional to 13,139.10, 19,708.10 and 6,116.70 is: 9,174.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.10 : 19,708.10 = 6,116.70 : x
  2. Step 2: Convert to fraction form
    13,139.10/19,708.10 = 6,116.70/x
  3. Step 3: Cross multiply
    13,139.10x = 19,708.10 × 6,116.70
  4. Step 4: Simplify right side
    13,139.10x = 120,548,504.69
  5. Step 5: Solve for x
    x = 120,548,504.69/13,139.10
  6. Step 6: Final answer
    x = 9,174.79

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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.