Home / 13,631.13-20,448-5,311.80

Finding the Fourth Proportional to 13,631.13, 20,448 and 5,311.80

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Solution

The fourth proportional to 13,631.13, 20,448 and 5,311.80 is: 7,968.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.13 : 20,448 = 5,311.80 : x
  2. Step 2: Convert to fraction form
    13,631.13/20,448 = 5,311.80/x
  3. Step 3: Cross multiply
    13,631.13x = 20,448 × 5,311.80
  4. Step 4: Simplify right side
    13,631.13x = 108,615,686.40
  5. Step 5: Solve for x
    x = 108,615,686.40/13,631.13
  6. Step 6: Final answer
    x = 7,968.21

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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.