Home / 27,878.31-38,468.00-15,939.34

Finding the Fourth Proportional to 27,878.31, 38,468.00 and 15,939.34

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Solution

The fourth proportional to 27,878.31, 38,468.00 and 15,939.34 is: 21,993.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,878.31 : 38,468.00 = 15,939.34 : x
  2. Step 2: Convert to fraction form
    27,878.31/38,468.00 = 15,939.34/x
  3. Step 3: Cross multiply
    27,878.31x = 38,468.00 × 15,939.34
  4. Step 4: Simplify right side
    27,878.31x = 613,154,474.80
  5. Step 5: Solve for x
    x = 613,154,474.80/27,878.31
  6. Step 6: Final answer
    x = 21,993.96

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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.