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Finding the Fourth Proportional to 41,005.60, 61,490.40 and 18,811.60

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Solution

The fourth proportional to 41,005.60, 61,490.40 and 18,811.60 is: 28,209.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,005.60 : 61,490.40 = 18,811.60 : x
  2. Step 2: Convert to fraction form
    41,005.60/61,490.40 = 18,811.60/x
  3. Step 3: Cross multiply
    41,005.60x = 61,490.40 × 18,811.60
  4. Step 4: Simplify right side
    41,005.60x = 1,156,732,808.64
  5. Step 5: Solve for x
    x = 1,156,732,808.64/41,005.60
  6. Step 6: Final answer
    x = 28,209.14

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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.