Home / 13,831.29-20,747.88-3,970.35

Finding the Fourth Proportional to 13,831.29, 20,747.88 and 3,970.35

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Solution

The fourth proportional to 13,831.29, 20,747.88 and 3,970.35 is: 5,955.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,831.29 : 20,747.88 = 3,970.35 : x
  2. Step 2: Convert to fraction form
    13,831.29/20,747.88 = 3,970.35/x
  3. Step 3: Cross multiply
    13,831.29x = 20,747.88 × 3,970.35
  4. Step 4: Simplify right side
    13,831.29x = 82,376,345.36
  5. Step 5: Solve for x
    x = 82,376,345.36/13,831.29
  6. Step 6: Final answer
    x = 5,955.80

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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.