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Finding the Fourth Proportional to 20,440.69, 30,655.11 and 7,957.93

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Solution

The fourth proportional to 20,440.69, 30,655.11 and 7,957.93 is: 11,934.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.69 : 30,655.11 = 7,957.93 : x
  2. Step 2: Convert to fraction form
    20,440.69/30,655.11 = 7,957.93/x
  3. Step 3: Cross multiply
    20,440.69x = 30,655.11 × 7,957.93
  4. Step 4: Simplify right side
    20,440.69x = 243,951,257.84
  5. Step 5: Solve for x
    x = 243,951,257.84/20,440.69
  6. Step 6: Final answer
    x = 11,934.59

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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.