Home / 3,831.80-5,287.56-2,153.08

Finding the Fourth Proportional to 3,831.80, 5,287.56 and 2,153.08

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Solution

The fourth proportional to 3,831.80, 5,287.56 and 2,153.08 is: 2,971.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.80 : 5,287.56 = 2,153.08 : x
  2. Step 2: Convert to fraction form
    3,831.80/5,287.56 = 2,153.08/x
  3. Step 3: Cross multiply
    3,831.80x = 5,287.56 × 2,153.08
  4. Step 4: Simplify right side
    3,831.80x = 11,384,513.25
  5. Step 5: Solve for x
    x = 11,384,513.25/3,831.80
  6. Step 6: Final answer
    x = 2,971.06

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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.