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Finding the Fourth Proportional to 40,990.76, 61,487.58 and 13,289

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Solution

The fourth proportional to 40,990.76, 61,487.58 and 13,289 is: 19,933.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,990.76 : 61,487.58 = 13,289 : x
  2. Step 2: Convert to fraction form
    40,990.76/61,487.58 = 13,289/x
  3. Step 3: Cross multiply
    40,990.76x = 61,487.58 × 13,289
  4. Step 4: Simplify right side
    40,990.76x = 817,108,450.62
  5. Step 5: Solve for x
    x = 817,108,450.62/40,990.76
  6. Step 6: Final answer
    x = 19,933.97

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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.