Home / 13,220.75-19,831.14-3,986.75

Finding the Fourth Proportional to 13,220.75, 19,831.14 and 3,986.75

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Solution

The fourth proportional to 13,220.75, 19,831.14 and 3,986.75 is: 5,980.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.75 : 19,831.14 = 3,986.75 : x
  2. Step 2: Convert to fraction form
    13,220.75/19,831.14 = 3,986.75/x
  3. Step 3: Cross multiply
    13,220.75x = 19,831.14 × 3,986.75
  4. Step 4: Simplify right side
    13,220.75x = 79,061,797.40
  5. Step 5: Solve for x
    x = 79,061,797.40/13,220.75
  6. Step 6: Final answer
    x = 5,980.13

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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.