Home / 20,406.24-28,172.88-13,344.48

Finding the Fourth Proportional to 20,406.24, 28,172.88 and 13,344.48

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Solution

The fourth proportional to 20,406.24, 28,172.88 and 13,344.48 is: 18,423.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.24 : 28,172.88 = 13,344.48 : x
  2. Step 2: Convert to fraction form
    20,406.24/28,172.88 = 13,344.48/x
  3. Step 3: Cross multiply
    20,406.24x = 28,172.88 × 13,344.48
  4. Step 4: Simplify right side
    20,406.24x = 375,952,433.70
  5. Step 5: Solve for x
    x = 375,952,433.70/20,406.24
  6. Step 6: Final answer
    x = 18,423.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.