Home / 13,831.20-20,730.36-7,975.74

Finding the Fourth Proportional to 13,831.20, 20,730.36 and 7,975.74

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Solution

The fourth proportional to 13,831.20, 20,730.36 and 7,975.74 is: 11,954.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,831.20 : 20,730.36 = 7,975.74 : x
  2. Step 2: Convert to fraction form
    13,831.20/20,730.36 = 7,975.74/x
  3. Step 3: Cross multiply
    13,831.20x = 20,730.36 × 7,975.74
  4. Step 4: Simplify right side
    13,831.20x = 165,339,961.47
  5. Step 5: Solve for x
    x = 165,339,961.47/13,831.20
  6. Step 6: Final answer
    x = 11,954.13

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1.5x scale

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.