Home / 21,277.89-31,917.15-8,130.96

Finding the Fourth Proportional to 21,277.89, 31,917.15 and 8,130.96

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Solution

The fourth proportional to 21,277.89, 31,917.15 and 8,130.96 is: 12,196.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.89 : 31,917.15 = 8,130.96 : x
  2. Step 2: Convert to fraction form
    21,277.89/31,917.15 = 8,130.96/x
  3. Step 3: Cross multiply
    21,277.89x = 31,917.15 × 8,130.96
  4. Step 4: Simplify right side
    21,277.89x = 259,517,069.96
  5. Step 5: Solve for x
    x = 259,517,069.96/21,277.89
  6. Step 6: Final answer
    x = 12,196.56

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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.