Home / 8,918.64-13,370.68-5,211.76

Finding the Fourth Proportional to 8,918.64, 13,370.68 and 5,211.76

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Solution

The fourth proportional to 8,918.64, 13,370.68 and 5,211.76 is: 7,813.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.64 : 13,370.68 = 5,211.76 : x
  2. Step 2: Convert to fraction form
    8,918.64/13,370.68 = 5,211.76/x
  3. Step 3: Cross multiply
    8,918.64x = 13,370.68 × 5,211.76
  4. Step 4: Simplify right side
    8,918.64x = 69,684,775.20
  5. Step 5: Solve for x
    x = 69,684,775.20/8,918.64
  6. Step 6: Final answer
    x = 7,813.39

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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.