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Finding the Fourth Proportional to 20,392.71, 30,580.74 and 7,910.34

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Solution

The fourth proportional to 20,392.71, 30,580.74 and 7,910.34 is: 11,862.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.71 : 30,580.74 = 7,910.34 : x
  2. Step 2: Convert to fraction form
    20,392.71/30,580.74 = 7,910.34/x
  3. Step 3: Cross multiply
    20,392.71x = 30,580.74 × 7,910.34
  4. Step 4: Simplify right side
    20,392.71x = 241,904,050.85
  5. Step 5: Solve for x
    x = 241,904,050.85/20,392.71
  6. Step 6: Final answer
    x = 11,862.28

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1.5x scale

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.