Home / 5,646.18-7,791.75-3,128.46

Finding the Fourth Proportional to 5,646.18, 7,791.75 and 3,128.46

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Solution

The fourth proportional to 5,646.18, 7,791.75 and 3,128.46 is: 4,317.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,646.18 : 7,791.75 = 3,128.46 : x
  2. Step 2: Convert to fraction form
    5,646.18/7,791.75 = 3,128.46/x
  3. Step 3: Cross multiply
    5,646.18x = 7,791.75 × 3,128.46
  4. Step 4: Simplify right side
    5,646.18x = 24,376,178.21
  5. Step 5: Solve for x
    x = 24,376,178.21/5,646.18
  6. Step 6: Final answer
    x = 4,317.29

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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.