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Finding the Fourth Proportional to 20,468.77, 30,714.94 and 8,621.62

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Solution

The fourth proportional to 20,468.77, 30,714.94 and 8,621.62 is: 12,937.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,468.77 : 30,714.94 = 8,621.62 : x
  2. Step 2: Convert to fraction form
    20,468.77/30,714.94 = 8,621.62/x
  3. Step 3: Cross multiply
    20,468.77x = 30,714.94 × 8,621.62
  4. Step 4: Simplify right side
    20,468.77x = 264,812,541.00
  5. Step 5: Solve for x
    x = 264,812,541.00/20,468.77
  6. Step 6: Final answer
    x = 12,937.39

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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.