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Finding the Fourth Proportional to 8,918.58, 13,373.01 and 3,720.54

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Solution

The fourth proportional to 8,918.58, 13,373.01 and 3,720.54 is: 5,578.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.58 : 13,373.01 = 3,720.54 : x
  2. Step 2: Convert to fraction form
    8,918.58/13,373.01 = 3,720.54/x
  3. Step 3: Cross multiply
    8,918.58x = 13,373.01 × 3,720.54
  4. Step 4: Simplify right side
    8,918.58x = 49,754,818.63
  5. Step 5: Solve for x
    x = 49,754,818.63/8,918.58
  6. Step 6: Final answer
    x = 5,578.78

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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.