Home / 12,455.09-17,178.30-7,979.25

Finding the Fourth Proportional to 12,455.09, 17,178.30 and 7,979.25

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Solution

The fourth proportional to 12,455.09, 17,178.30 and 7,979.25 is: 11,005.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.09 : 17,178.30 = 7,979.25 : x
  2. Step 2: Convert to fraction form
    12,455.09/17,178.30 = 7,979.25/x
  3. Step 3: Cross multiply
    12,455.09x = 17,178.30 × 7,979.25
  4. Step 4: Simplify right side
    12,455.09x = 137,070,030.80
  5. Step 5: Solve for x
    x = 137,070,030.80/12,455.09
  6. Step 6: Final answer
    x = 11,005.14

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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.