Home / 3,831.88-5,288.15-2,153.28

Finding the Fourth Proportional to 3,831.88, 5,288.15 and 2,153.28

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Solution

The fourth proportional to 3,831.88, 5,288.15 and 2,153.28 is: 2,971.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.88 : 5,288.15 = 2,153.28 : x
  2. Step 2: Convert to fraction form
    3,831.88/5,288.15 = 2,153.28/x
  3. Step 3: Cross multiply
    3,831.88x = 5,288.15 × 2,153.28
  4. Step 4: Simplify right side
    3,831.88x = 11,386,892.85
  5. Step 5: Solve for x
    x = 11,386,892.85/3,831.88
  6. Step 6: Final answer
    x = 2,971.62

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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.