Home / 12,455.37-17,178.69-7,979.54

Finding the Fourth Proportional to 12,455.37, 17,178.69 and 7,979.54

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Solution

The fourth proportional to 12,455.37, 17,178.69 and 7,979.54 is: 11,005.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.37 : 17,178.69 = 7,979.54 : x
  2. Step 2: Convert to fraction form
    12,455.37/17,178.69 = 7,979.54/x
  3. Step 3: Cross multiply
    12,455.37x = 17,178.69 × 7,979.54
  4. Step 4: Simplify right side
    12,455.37x = 137,077,928.19
  5. Step 5: Solve for x
    x = 137,077,928.19/12,455.37
  6. Step 6: Final answer
    x = 11,005.53

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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.