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Finding the Fourth Proportional to 12,480.77, 18,714.90 and 4,157.86

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Solution

The fourth proportional to 12,480.77, 18,714.90 and 4,157.86 is: 6,234.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.77 : 18,714.90 = 4,157.86 : x
  2. Step 2: Convert to fraction form
    12,480.77/18,714.90 = 4,157.86/x
  3. Step 3: Cross multiply
    12,480.77x = 18,714.90 × 4,157.86
  4. Step 4: Simplify right side
    12,480.77x = 77,813,913.32
  5. Step 5: Solve for x
    x = 77,813,913.32/12,480.77
  6. Step 6: Final answer
    x = 6,234.70

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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.