Home / 13,120.49-19,686.55-6,879.01

Finding the Fourth Proportional to 13,120.49, 19,686.55 and 6,879.01

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Solution

The fourth proportional to 13,120.49, 19,686.55 and 6,879.01 is: 10,321.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.49 : 19,686.55 = 6,879.01 : x
  2. Step 2: Convert to fraction form
    13,120.49/19,686.55 = 6,879.01/x
  3. Step 3: Cross multiply
    13,120.49x = 19,686.55 × 6,879.01
  4. Step 4: Simplify right side
    13,120.49x = 135,423,974.32
  5. Step 5: Solve for x
    x = 135,423,974.32/13,120.49
  6. Step 6: Final answer
    x = 10,321.56

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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.