Home / 11,728.45-16,185.32-6,423.76

Finding the Fourth Proportional to 11,728.45, 16,185.32 and 6,423.76

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Solution

The fourth proportional to 11,728.45, 16,185.32 and 6,423.76 is: 8,864.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,728.45 : 16,185.32 = 6,423.76 : x
  2. Step 2: Convert to fraction form
    11,728.45/16,185.32 = 6,423.76/x
  3. Step 3: Cross multiply
    11,728.45x = 16,185.32 × 6,423.76
  4. Step 4: Simplify right side
    11,728.45x = 103,970,611.20
  5. Step 5: Solve for x
    x = 103,970,611.20/11,728.45
  6. Step 6: Final answer
    x = 8,864.82

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.