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Finding the Fourth Proportional to 20,437.76, 30,658.62 and 7,958.82

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Solution

The fourth proportional to 20,437.76, 30,658.62 and 7,958.82 is: 11,939.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,437.76 : 30,658.62 = 7,958.82 : x
  2. Step 2: Convert to fraction form
    20,437.76/30,658.62 = 7,958.82/x
  3. Step 3: Cross multiply
    20,437.76x = 30,658.62 × 7,958.82
  4. Step 4: Simplify right side
    20,437.76x = 244,006,438.03
  5. Step 5: Solve for x
    x = 244,006,438.03/20,437.76
  6. Step 6: Final answer
    x = 11,939.00

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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.