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Finding the Fourth Proportional to 20,612.88, 30,914.46 and 7,468.20

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Solution

The fourth proportional to 20,612.88, 30,914.46 and 7,468.20 is: 11,200.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.88 : 30,914.46 = 7,468.20 : x
  2. Step 2: Convert to fraction form
    20,612.88/30,914.46 = 7,468.20/x
  3. Step 3: Cross multiply
    20,612.88x = 30,914.46 × 7,468.20
  4. Step 4: Simplify right side
    20,612.88x = 230,875,370.17
  5. Step 5: Solve for x
    x = 230,875,370.17/20,612.88
  6. Step 6: Final answer
    x = 11,200.54

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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.