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Finding the Fourth Proportional to 11,810.80, 17,719.10 and 3,490.77

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Solution

The fourth proportional to 11,810.80, 17,719.10 and 3,490.77 is: 5,237.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,810.80 : 17,719.10 = 3,490.77 : x
  2. Step 2: Convert to fraction form
    11,810.80/17,719.10 = 3,490.77/x
  3. Step 3: Cross multiply
    11,810.80x = 17,719.10 × 3,490.77
  4. Step 4: Simplify right side
    11,810.80x = 61,853,302.71
  5. Step 5: Solve for x
    x = 61,853,302.71/11,810.80
  6. Step 6: Final answer
    x = 5,237.01

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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.