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Finding the Fourth Proportional to 12,578.94, 17,357.88 and 6,913.38

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Solution

The fourth proportional to 12,578.94, 17,357.88 and 6,913.38 is: 9,539.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578.94 : 17,357.88 = 6,913.38 : x
  2. Step 2: Convert to fraction form
    12,578.94/17,357.88 = 6,913.38/x
  3. Step 3: Cross multiply
    12,578.94x = 17,357.88 × 6,913.38
  4. Step 4: Simplify right side
    12,578.94x = 120,001,620.43
  5. Step 5: Solve for x
    x = 120,001,620.43/12,578.94
  6. Step 6: Final answer
    x = 9,539.88

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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.