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Finding the Fourth Proportional to 12,402.62, 17,115.88 and 6,813.98

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Solution

The fourth proportional to 12,402.62, 17,115.88 and 6,813.98 is: 9,403.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,402.62 : 17,115.88 = 6,813.98 : x
  2. Step 2: Convert to fraction form
    12,402.62/17,115.88 = 6,813.98/x
  3. Step 3: Cross multiply
    12,402.62x = 17,115.88 × 6,813.98
  4. Step 4: Simplify right side
    12,402.62x = 116,627,161.39
  5. Step 5: Solve for x
    x = 116,627,161.39/12,402.62
  6. Step 6: Final answer
    x = 9,403.43

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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.