Home / 3,831.70-5,287.62-2,153.29

Finding the Fourth Proportional to 3,831.70, 5,287.62 and 2,153.29

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Solution

The fourth proportional to 3,831.70, 5,287.62 and 2,153.29 is: 2,971.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.70 : 5,287.62 = 2,153.29 : x
  2. Step 2: Convert to fraction form
    3,831.70/5,287.62 = 2,153.29/x
  3. Step 3: Cross multiply
    3,831.70x = 5,287.62 × 2,153.29
  4. Step 4: Simplify right side
    3,831.70x = 11,385,779.27
  5. Step 5: Solve for x
    x = 11,385,779.27/3,831.70
  6. Step 6: Final answer
    x = 2,971.47

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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.