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Finding the Fourth Proportional to 20,163.89, 30,242.59 and 6,312.89

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Solution

The fourth proportional to 20,163.89, 30,242.59 and 6,312.89 is: 9,468.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,163.89 : 30,242.59 = 6,312.89 : x
  2. Step 2: Convert to fraction form
    20,163.89/30,242.59 = 6,312.89/x
  3. Step 3: Cross multiply
    20,163.89x = 30,242.59 × 6,312.89
  4. Step 4: Simplify right side
    20,163.89x = 190,918,143.99
  5. Step 5: Solve for x
    x = 190,918,143.99/20,163.89
  6. Step 6: Final answer
    x = 9,468.32

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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.