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Finding the Fourth Proportional to 8,645.10, 12,969.71 and 2,801.70

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Solution

The fourth proportional to 8,645.10, 12,969.71 and 2,801.70 is: 4,203.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.10 : 12,969.71 = 2,801.70 : x
  2. Step 2: Convert to fraction form
    8,645.10/12,969.71 = 2,801.70/x
  3. Step 3: Cross multiply
    8,645.10x = 12,969.71 × 2,801.70
  4. Step 4: Simplify right side
    8,645.10x = 36,337,236.51
  5. Step 5: Solve for x
    x = 36,337,236.51/8,645.10
  6. Step 6: Final answer
    x = 4,203.22

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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.