Home / 3,864.97-5,320.75-3,688.66

Finding the Fourth Proportional to 3,864.97, 5,320.75 and 3,688.66

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Solution

The fourth proportional to 3,864.97, 5,320.75 and 3,688.66 is: 5,078.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,864.97 : 5,320.75 = 3,688.66 : x
  2. Step 2: Convert to fraction form
    3,864.97/5,320.75 = 3,688.66/x
  3. Step 3: Cross multiply
    3,864.97x = 5,320.75 × 3,688.66
  4. Step 4: Simplify right side
    3,864.97x = 19,626,428.47
  5. Step 5: Solve for x
    x = 19,626,428.47/3,864.97
  6. Step 6: Final answer
    x = 5,078.03

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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.