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Finding the Fourth Proportional to 12,398.52, 17,109.54 and 6,809.40

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Solution

The fourth proportional to 12,398.52, 17,109.54 and 6,809.40 is: 9,396.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,398.52 : 17,109.54 = 6,809.40 : x
  2. Step 2: Convert to fraction form
    12,398.52/17,109.54 = 6,809.40/x
  3. Step 3: Cross multiply
    12,398.52x = 17,109.54 × 6,809.40
  4. Step 4: Simplify right side
    12,398.52x = 116,505,701.68
  5. Step 5: Solve for x
    x = 116,505,701.68/12,398.52
  6. Step 6: Final answer
    x = 9,396.74

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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.