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Finding the Fourth Proportional to 8,831.81, 12,187.86 and 5,054.78

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Solution

The fourth proportional to 8,831.81, 12,187.86 and 5,054.78 is: 6,975.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,831.81 : 12,187.86 = 5,054.78 : x
  2. Step 2: Convert to fraction form
    8,831.81/12,187.86 = 5,054.78/x
  3. Step 3: Cross multiply
    8,831.81x = 12,187.86 × 5,054.78
  4. Step 4: Simplify right side
    8,831.81x = 61,606,950.97
  5. Step 5: Solve for x
    x = 61,606,950.97/8,831.81
  6. Step 6: Final answer
    x = 6,975.57

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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.