Home / 6,831.81-9,418.28-5,155.11

Finding the Fourth Proportional to 6,831.81, 9,418.28 and 5,155.11

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Solution

The fourth proportional to 6,831.81, 9,418.28 and 5,155.11 is: 7,106.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,831.81 : 9,418.28 = 5,155.11 : x
  2. Step 2: Convert to fraction form
    6,831.81/9,418.28 = 5,155.11/x
  3. Step 3: Cross multiply
    6,831.81x = 9,418.28 × 5,155.11
  4. Step 4: Simplify right side
    6,831.81x = 48,552,243.64
  5. Step 5: Solve for x
    x = 48,552,243.64/6,831.81
  6. Step 6: Final answer
    x = 7,106.79

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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.