Home / 27,961.78-38,587.98-15,215.77

Finding the Fourth Proportional to 27,961.78, 38,587.98 and 15,215.77

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Solution

The fourth proportional to 27,961.78, 38,587.98 and 15,215.77 is: 20,998.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,961.78 : 38,587.98 = 15,215.77 : x
  2. Step 2: Convert to fraction form
    27,961.78/38,587.98 = 15,215.77/x
  3. Step 3: Cross multiply
    27,961.78x = 38,587.98 × 15,215.77
  4. Step 4: Simplify right side
    27,961.78x = 587,145,828.44
  5. Step 5: Solve for x
    x = 587,145,828.44/27,961.78
  6. Step 6: Final answer
    x = 20,998.16

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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.