Home / 13,831.12-20,735.04-6,431.80

Finding the Fourth Proportional to 13,831.12, 20,735.04 and 6,431.80

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Solution

The fourth proportional to 13,831.12, 20,735.04 and 6,431.80 is: 9,642.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,831.12 : 20,735.04 = 6,431.80 : x
  2. Step 2: Convert to fraction form
    13,831.12/20,735.04 = 6,431.80/x
  3. Step 3: Cross multiply
    13,831.12x = 20,735.04 × 6,431.80
  4. Step 4: Simplify right side
    13,831.12x = 133,363,630.27
  5. Step 5: Solve for x
    x = 133,363,630.27/13,831.12
  6. Step 6: Final answer
    x = 9,642.29

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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.