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Finding the Fourth Proportional to 8,580.69, 12,863.66 and 3,390.21

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Solution

The fourth proportional to 8,580.69, 12,863.66 and 3,390.21 is: 5,082.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,580.69 : 12,863.66 = 3,390.21 : x
  2. Step 2: Convert to fraction form
    8,580.69/12,863.66 = 3,390.21/x
  3. Step 3: Cross multiply
    8,580.69x = 12,863.66 × 3,390.21
  4. Step 4: Simplify right side
    8,580.69x = 43,610,491.82
  5. Step 5: Solve for x
    x = 43,610,491.82/8,580.69
  6. Step 6: Final answer
    x = 5,082.40

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1.5x scale

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.