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Finding the Fourth Proportional to 14,615.05, 20,168.69 and 7,900.69

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Solution

The fourth proportional to 14,615.05, 20,168.69 and 7,900.69 is: 10,902.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,615.05 : 20,168.69 = 7,900.69 : x
  2. Step 2: Convert to fraction form
    14,615.05/20,168.69 = 7,900.69/x
  3. Step 3: Cross multiply
    14,615.05x = 20,168.69 × 7,900.69
  4. Step 4: Simplify right side
    14,615.05x = 159,346,536.73
  5. Step 5: Solve for x
    x = 159,346,536.73/14,615.05
  6. Step 6: Final answer
    x = 10,902.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.