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Finding the Fourth Proportional to 11,765.80, 17,619.90 and 5,602.60

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Solution

The fourth proportional to 11,765.80, 17,619.90 and 5,602.60 is: 8,390.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,765.80 : 17,619.90 = 5,602.60 : x
  2. Step 2: Convert to fraction form
    11,765.80/17,619.90 = 5,602.60/x
  3. Step 3: Cross multiply
    11,765.80x = 17,619.90 × 5,602.60
  4. Step 4: Simplify right side
    11,765.80x = 98,717,251.74
  5. Step 5: Solve for x
    x = 98,717,251.74/11,765.80
  6. Step 6: Final answer
    x = 8,390.19

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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.