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Finding the Fourth Proportional to 8,780.10, 13,163.94 and 4,394.40

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Solution

The fourth proportional to 8,780.10, 13,163.94 and 4,394.40 is: 6,588.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780.10 : 13,163.94 = 4,394.40 : x
  2. Step 2: Convert to fraction form
    8,780.10/13,163.94 = 4,394.40/x
  3. Step 3: Cross multiply
    8,780.10x = 13,163.94 × 4,394.40
  4. Step 4: Simplify right side
    8,780.10x = 57,847,617.94
  5. Step 5: Solve for x
    x = 57,847,617.94/8,780.10
  6. Step 6: Final answer
    x = 6,588.49

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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.