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Finding the Fourth Proportional to 32,719.80, 49,065.30 and 12,991.80

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Solution

The fourth proportional to 32,719.80, 49,065.30 and 12,991.80 is: 19,481.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,719.80 : 49,065.30 = 12,991.80 : x
  2. Step 2: Convert to fraction form
    32,719.80/49,065.30 = 12,991.80/x
  3. Step 3: Cross multiply
    32,719.80x = 49,065.30 × 12,991.80
  4. Step 4: Simplify right side
    32,719.80x = 637,446,564.54
  5. Step 5: Solve for x
    x = 637,446,564.54/32,719.80
  6. Step 6: Final answer
    x = 19,481.98

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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.