Home / 27,979.10-38,611.30-15,403.84

Finding the Fourth Proportional to 27,979.10, 38,611.30 and 15,403.84

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Solution

The fourth proportional to 27,979.10, 38,611.30 and 15,403.84 is: 21,257.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,979.10 : 38,611.30 = 15,403.84 : x
  2. Step 2: Convert to fraction form
    27,979.10/38,611.30 = 15,403.84/x
  3. Step 3: Cross multiply
    27,979.10x = 38,611.30 × 15,403.84
  4. Step 4: Simplify right side
    27,979.10x = 594,762,287.39
  5. Step 5: Solve for x
    x = 594,762,287.39/27,979.10
  6. Step 6: Final answer
    x = 21,257.38

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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.