Home / 13,917.24-20,872.62-6,990.12

Finding the Fourth Proportional to 13,917.24, 20,872.62 and 6,990.12

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Solution

The fourth proportional to 13,917.24, 20,872.62 and 6,990.12 is: 10,483.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,917.24 : 20,872.62 = 6,990.12 : x
  2. Step 2: Convert to fraction form
    13,917.24/20,872.62 = 6,990.12/x
  3. Step 3: Cross multiply
    13,917.24x = 20,872.62 × 6,990.12
  4. Step 4: Simplify right side
    13,917.24x = 145,902,118.51
  5. Step 5: Solve for x
    x = 145,902,118.51/13,917.24
  6. Step 6: Final answer
    x = 10,483.55

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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.