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Finding the Fourth Proportional to 12,392.87, 17,097.99 and 7,919.24

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Solution

The fourth proportional to 12,392.87, 17,097.99 and 7,919.24 is: 10,925.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,392.87 : 17,097.99 = 7,919.24 : x
  2. Step 2: Convert to fraction form
    12,392.87/17,097.99 = 7,919.24/x
  3. Step 3: Cross multiply
    12,392.87x = 17,097.99 × 7,919.24
  4. Step 4: Simplify right side
    12,392.87x = 135,403,086.33
  5. Step 5: Solve for x
    x = 135,403,086.33/12,392.87
  6. Step 6: Final answer
    x = 10,925.89

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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.