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Finding the Fourth Proportional to 6,890.49, 9,512.51 and 5,531.31

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Solution

The fourth proportional to 6,890.49, 9,512.51 and 5,531.31 is: 7,636.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,890.49 : 9,512.51 = 5,531.31 : x
  2. Step 2: Convert to fraction form
    6,890.49/9,512.51 = 5,531.31/x
  3. Step 3: Cross multiply
    6,890.49x = 9,512.51 × 5,531.31
  4. Step 4: Simplify right side
    6,890.49x = 52,616,614.03
  5. Step 5: Solve for x
    x = 52,616,614.03/6,890.49
  6. Step 6: Final answer
    x = 7,636.12

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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.