Home / 5,781.09-7,977.92-3,128.50

Finding the Fourth Proportional to 5,781.09, 7,977.92 and 3,128.50

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Solution

The fourth proportional to 5,781.09, 7,977.92 and 3,128.50 is: 4,317.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,781.09 : 7,977.92 = 3,128.50 : x
  2. Step 2: Convert to fraction form
    5,781.09/7,977.92 = 3,128.50/x
  3. Step 3: Cross multiply
    5,781.09x = 7,977.92 × 3,128.50
  4. Step 4: Simplify right side
    5,781.09x = 24,958,899.23
  5. Step 5: Solve for x
    x = 24,958,899.23/5,781.09
  6. Step 6: Final answer
    x = 4,317.34

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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.