Home / 20,512.07-30,768.78-5,719.74

Finding the Fourth Proportional to 20,512.07, 30,768.78 and 5,719.74

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Solution

The fourth proportional to 20,512.07, 30,768.78 and 5,719.74 is: 8,579.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.07 : 30,768.78 = 5,719.74 : x
  2. Step 2: Convert to fraction form
    20,512.07/30,768.78 = 5,719.74/x
  3. Step 3: Cross multiply
    20,512.07x = 30,768.78 × 5,719.74
  4. Step 4: Simplify right side
    20,512.07x = 175,989,421.72
  5. Step 5: Solve for x
    x = 175,989,421.72/20,512.07
  6. Step 6: Final answer
    x = 8,579.80

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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.