Home / 13,311.51-19,979.57-6,742.31

Finding the Fourth Proportional to 13,311.51, 19,979.57 and 6,742.31

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Solution

The fourth proportional to 13,311.51, 19,979.57 and 6,742.31 is: 10,119.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,311.51 : 19,979.57 = 6,742.31 : x
  2. Step 2: Convert to fraction form
    13,311.51/19,979.57 = 6,742.31/x
  3. Step 3: Cross multiply
    13,311.51x = 19,979.57 × 6,742.31
  4. Step 4: Simplify right side
    13,311.51x = 134,708,321.00
  5. Step 5: Solve for x
    x = 134,708,321.00/13,311.51
  6. Step 6: Final answer
    x = 10,119.69

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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.