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Finding the Fourth Proportional to 40,991.70, 61,485.12 and 14,335.83

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Solution

The fourth proportional to 40,991.70, 61,485.12 and 14,335.83 is: 21,502.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,991.70 : 61,485.12 = 14,335.83 : x
  2. Step 2: Convert to fraction form
    40,991.70/61,485.12 = 14,335.83/x
  3. Step 3: Cross multiply
    40,991.70x = 61,485.12 × 14,335.83
  4. Step 4: Simplify right side
    40,991.70x = 881,440,227.85
  5. Step 5: Solve for x
    x = 881,440,227.85/40,991.70
  6. Step 6: Final answer
    x = 21,502.90

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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.