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Finding the Fourth Proportional to 20,332.61, 30,507.68 and 7,861.41

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Solution

The fourth proportional to 20,332.61, 30,507.68 and 7,861.41 is: 11,795.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,332.61 : 30,507.68 = 7,861.41 : x
  2. Step 2: Convert to fraction form
    20,332.61/30,507.68 = 7,861.41/x
  3. Step 3: Cross multiply
    20,332.61x = 30,507.68 × 7,861.41
  4. Step 4: Simplify right side
    20,332.61x = 239,833,416.21
  5. Step 5: Solve for x
    x = 239,833,416.21/20,332.61
  6. Step 6: Final answer
    x = 11,795.51

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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.