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Finding the Fourth Proportional to 20,347.79, 28,079.12 and 11,850.17

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Solution

The fourth proportional to 20,347.79, 28,079.12 and 11,850.17 is: 16,352.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,347.79 : 28,079.12 = 11,850.17 : x
  2. Step 2: Convert to fraction form
    20,347.79/28,079.12 = 11,850.17/x
  3. Step 3: Cross multiply
    20,347.79x = 28,079.12 × 11,850.17
  4. Step 4: Simplify right side
    20,347.79x = 332,742,234.68
  5. Step 5: Solve for x
    x = 332,742,234.68/20,347.79
  6. Step 6: Final answer
    x = 16,352.75

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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.