Home / 20,344.72-28,072.56-11,392.60

Finding the Fourth Proportional to 20,344.72, 28,072.56 and 11,392.60

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Solution

The fourth proportional to 20,344.72, 28,072.56 and 11,392.60 is: 15,720.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,344.72 : 28,072.56 = 11,392.60 : x
  2. Step 2: Convert to fraction form
    20,344.72/28,072.56 = 11,392.60/x
  3. Step 3: Cross multiply
    20,344.72x = 28,072.56 × 11,392.60
  4. Step 4: Simplify right side
    20,344.72x = 319,819,447.06
  5. Step 5: Solve for x
    x = 319,819,447.06/20,344.72
  6. Step 6: Final answer
    x = 15,720.02

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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.