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Finding the Fourth Proportional to 14,311.32, 19,750.82 and 7,939.98

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Solution

The fourth proportional to 14,311.32, 19,750.82 and 7,939.98 is: 10,957.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,311.32 : 19,750.82 = 7,939.98 : x
  2. Step 2: Convert to fraction form
    14,311.32/19,750.82 = 7,939.98/x
  3. Step 3: Cross multiply
    14,311.32x = 19,750.82 × 7,939.98
  4. Step 4: Simplify right side
    14,311.32x = 156,821,115.78
  5. Step 5: Solve for x
    x = 156,821,115.78/14,311.32
  6. Step 6: Final answer
    x = 10,957.84

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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.