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Finding the Fourth Proportional to 40,798.80, 61,196.65 and 11,215.87

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Solution

The fourth proportional to 40,798.80, 61,196.65 and 11,215.87 is: 16,823.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,798.80 : 61,196.65 = 11,215.87 : x
  2. Step 2: Convert to fraction form
    40,798.80/61,196.65 = 11,215.87/x
  3. Step 3: Cross multiply
    40,798.80x = 61,196.65 × 11,215.87
  4. Step 4: Simplify right side
    40,798.80x = 686,373,489.80
  5. Step 5: Solve for x
    x = 686,373,489.80/40,798.80
  6. Step 6: Final answer
    x = 16,823.37

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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.