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Finding the Fourth Proportional to 20,615.68, 30,905.04 and 9,516.76

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Solution

The fourth proportional to 20,615.68, 30,905.04 and 9,516.76 is: 14,266.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.68 : 30,905.04 = 9,516.76 : x
  2. Step 2: Convert to fraction form
    20,615.68/30,905.04 = 9,516.76/x
  3. Step 3: Cross multiply
    20,615.68x = 30,905.04 × 9,516.76
  4. Step 4: Simplify right side
    20,615.68x = 294,115,848.47
  5. Step 5: Solve for x
    x = 294,115,848.47/20,615.68
  6. Step 6: Final answer
    x = 14,266.61

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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.