Home / 27,811.98-38,374.78-15,879.20

Finding the Fourth Proportional to 27,811.98, 38,374.78 and 15,879.20

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Solution

The fourth proportional to 27,811.98, 38,374.78 and 15,879.20 is: 21,910.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,811.98 : 38,374.78 = 15,879.20 : x
  2. Step 2: Convert to fraction form
    27,811.98/38,374.78 = 15,879.20/x
  3. Step 3: Cross multiply
    27,811.98x = 38,374.78 × 15,879.20
  4. Step 4: Simplify right side
    27,811.98x = 609,360,806.58
  5. Step 5: Solve for x
    x = 609,360,806.58/27,811.98
  6. Step 6: Final answer
    x = 21,910.01

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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.