Home / 13,191.18-19,787.80-3,831.35

Finding the Fourth Proportional to 13,191.18, 19,787.80 and 3,831.35

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Solution

The fourth proportional to 13,191.18, 19,787.80 and 3,831.35 is: 5,747.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.18 : 19,787.80 = 3,831.35 : x
  2. Step 2: Convert to fraction form
    13,191.18/19,787.80 = 3,831.35/x
  3. Step 3: Cross multiply
    13,191.18x = 19,787.80 × 3,831.35
  4. Step 4: Simplify right side
    13,191.18x = 75,813,953.22
  5. Step 5: Solve for x
    x = 75,813,953.22/13,191.18
  6. Step 6: Final answer
    x = 5,747.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.