Home / 20,878.45-31,327.97-9,783.22

Finding the Fourth Proportional to 20,878.45, 31,327.97 and 9,783.22

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Solution

The fourth proportional to 20,878.45, 31,327.97 and 9,783.22 is: 14,679.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.45 : 31,327.97 = 9,783.22 : x
  2. Step 2: Convert to fraction form
    20,878.45/31,327.97 = 9,783.22/x
  3. Step 3: Cross multiply
    20,878.45x = 31,327.97 × 9,783.22
  4. Step 4: Simplify right side
    20,878.45x = 306,488,422.66
  5. Step 5: Solve for x
    x = 306,488,422.66/20,878.45
  6. Step 6: Final answer
    x = 14,679.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.