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Finding the Fourth Proportional to 7,169.85, 9,890.10 and 4,512.51

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Solution

The fourth proportional to 7,169.85, 9,890.10 and 4,512.51 is: 6,224.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,169.85 : 9,890.10 = 4,512.51 : x
  2. Step 2: Convert to fraction form
    7,169.85/9,890.10 = 4,512.51/x
  3. Step 3: Cross multiply
    7,169.85x = 9,890.10 × 4,512.51
  4. Step 4: Simplify right side
    7,169.85x = 44,629,175.15
  5. Step 5: Solve for x
    x = 44,629,175.15/7,169.85
  6. Step 6: Final answer
    x = 6,224.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.