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Finding the Fourth Proportional to 11,901.42, 16,405.02 and 9,379.44

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Solution

The fourth proportional to 11,901.42, 16,405.02 and 9,379.44 is: 12,928.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,901.42 : 16,405.02 = 9,379.44 : x
  2. Step 2: Convert to fraction form
    11,901.42/16,405.02 = 9,379.44/x
  3. Step 3: Cross multiply
    11,901.42x = 16,405.02 × 9,379.44
  4. Step 4: Simplify right side
    11,901.42x = 153,869,900.79
  5. Step 5: Solve for x
    x = 153,869,900.79/11,901.42
  6. Step 6: Final answer
    x = 12,928.70

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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.