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Finding the Fourth Proportional to 20,615.14, 30,920.18 and 8,773.67

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Solution

The fourth proportional to 20,615.14, 30,920.18 and 8,773.67 is: 13,159.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.14 : 30,920.18 = 8,773.67 : x
  2. Step 2: Convert to fraction form
    20,615.14/30,920.18 = 8,773.67/x
  3. Step 3: Cross multiply
    20,615.14x = 30,920.18 × 8,773.67
  4. Step 4: Simplify right side
    20,615.14x = 271,283,301.06
  5. Step 5: Solve for x
    x = 271,283,301.06/20,615.14
  6. Step 6: Final answer
    x = 13,159.42

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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.