Home / 3,831.47-5,287.16-2,152.79

Finding the Fourth Proportional to 3,831.47, 5,287.16 and 2,152.79

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Solution

The fourth proportional to 3,831.47, 5,287.16 and 2,152.79 is: 2,970.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.47 : 5,287.16 = 2,152.79 : x
  2. Step 2: Convert to fraction form
    3,831.47/5,287.16 = 2,152.79/x
  3. Step 3: Cross multiply
    3,831.47x = 5,287.16 × 2,152.79
  4. Step 4: Simplify right side
    3,831.47x = 11,382,134.41
  5. Step 5: Solve for x
    x = 11,382,134.41/3,831.47
  6. Step 6: Final answer
    x = 2,970.70

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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.