Home / 12,448.64-17,178.32-7,142.24

Finding the Fourth Proportional to 12,448.64, 17,178.32 and 7,142.24

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Solution

The fourth proportional to 12,448.64, 17,178.32 and 7,142.24 is: 9,855.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,448.64 : 17,178.32 = 7,142.24 : x
  2. Step 2: Convert to fraction form
    12,448.64/17,178.32 = 7,142.24/x
  3. Step 3: Cross multiply
    12,448.64x = 17,178.32 × 7,142.24
  4. Step 4: Simplify right side
    12,448.64x = 122,691,684.24
  5. Step 5: Solve for x
    x = 122,691,684.24/12,448.64
  6. Step 6: Final answer
    x = 9,855.83

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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.