Home / 7,985.39-11,979.16-2,439.11

Finding the Fourth Proportional to 7,985.39, 11,979.16 and 2,439.11

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Solution

The fourth proportional to 7,985.39, 11,979.16 and 2,439.11 is: 3,659.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.39 : 11,979.16 = 2,439.11 : x
  2. Step 2: Convert to fraction form
    7,985.39/11,979.16 = 2,439.11/x
  3. Step 3: Cross multiply
    7,985.39x = 11,979.16 × 2,439.11
  4. Step 4: Simplify right side
    7,985.39x = 29,218,512.80
  5. Step 5: Solve for x
    x = 29,218,512.80/7,985.39
  6. Step 6: Final answer
    x = 3,659.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.