Home / 27,979.09-38,611.16-15,403.75

Finding the Fourth Proportional to 27,979.09, 38,611.16 and 15,403.75

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Solution

The fourth proportional to 27,979.09, 38,611.16 and 15,403.75 is: 21,257.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,979.09 : 38,611.16 = 15,403.75 : x
  2. Step 2: Convert to fraction form
    27,979.09/38,611.16 = 15,403.75/x
  3. Step 3: Cross multiply
    27,979.09x = 38,611.16 × 15,403.75
  4. Step 4: Simplify right side
    27,979.09x = 594,756,655.85
  5. Step 5: Solve for x
    x = 594,756,655.85/27,979.09
  6. Step 6: Final answer
    x = 21,257.18

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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.