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Finding the Fourth Proportional to 20,477.91, 30,715.92 and 8,468.58

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Solution

The fourth proportional to 20,477.91, 30,715.92 and 8,468.58 is: 12,702.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,477.91 : 30,715.92 = 8,468.58 : x
  2. Step 2: Convert to fraction form
    20,477.91/30,715.92 = 8,468.58/x
  3. Step 3: Cross multiply
    20,477.91x = 30,715.92 × 8,468.58
  4. Step 4: Simplify right side
    20,477.91x = 260,120,225.79
  5. Step 5: Solve for x
    x = 260,120,225.79/20,477.91
  6. Step 6: Final answer
    x = 12,702.48

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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.