Home / 6,809.80-10,215.40-2,129.02

Finding the Fourth Proportional to 6,809.80, 10,215.40 and 2,129.02

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Solution

The fourth proportional to 6,809.80, 10,215.40 and 2,129.02 is: 3,193.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,809.80 : 10,215.40 = 2,129.02 : x
  2. Step 2: Convert to fraction form
    6,809.80/10,215.40 = 2,129.02/x
  3. Step 3: Cross multiply
    6,809.80x = 10,215.40 × 2,129.02
  4. Step 4: Simplify right side
    6,809.80x = 21,748,790.91
  5. Step 5: Solve for x
    x = 21,748,790.91/6,809.80
  6. Step 6: Final answer
    x = 3,193.75

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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.