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Finding the Fourth Proportional to 11,900.64, 16,423.64 and 6,865.78

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Solution

The fourth proportional to 11,900.64, 16,423.64 and 6,865.78 is: 9,475.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,900.64 : 16,423.64 = 6,865.78 : x
  2. Step 2: Convert to fraction form
    11,900.64/16,423.64 = 6,865.78/x
  3. Step 3: Cross multiply
    11,900.64x = 16,423.64 × 6,865.78
  4. Step 4: Simplify right side
    11,900.64x = 112,761,099.04
  5. Step 5: Solve for x
    x = 112,761,099.04/11,900.64
  6. Step 6: Final answer
    x = 9,475.21

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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.