Home / 3,831.69-5,287.68-2,153.10

Finding the Fourth Proportional to 3,831.69, 5,287.68 and 2,153.10

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Solution

The fourth proportional to 3,831.69, 5,287.68 and 2,153.10 is: 2,971.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.69 : 5,287.68 = 2,153.10 : x
  2. Step 2: Convert to fraction form
    3,831.69/5,287.68 = 2,153.10/x
  3. Step 3: Cross multiply
    3,831.69x = 5,287.68 × 2,153.10
  4. Step 4: Simplify right side
    3,831.69x = 11,384,903.81
  5. Step 5: Solve for x
    x = 11,384,903.81/3,831.69
  6. Step 6: Final answer
    x = 2,971.25

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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.