Home / 5,613.82-7,750.40-4,991.09

Finding the Fourth Proportional to 5,613.82, 7,750.40 and 4,991.09

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Solution

The fourth proportional to 5,613.82, 7,750.40 and 4,991.09 is: 6,890.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,613.82 : 7,750.40 = 4,991.09 : x
  2. Step 2: Convert to fraction form
    5,613.82/7,750.40 = 4,991.09/x
  3. Step 3: Cross multiply
    5,613.82x = 7,750.40 × 4,991.09
  4. Step 4: Simplify right side
    5,613.82x = 38,682,937.04
  5. Step 5: Solve for x
    x = 38,682,937.04/5,613.82
  6. Step 6: Final answer
    x = 6,890.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.