Home / 21,293.30-31,938.86-8,144.66

Finding the Fourth Proportional to 21,293.30, 31,938.86 and 8,144.66

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Solution

The fourth proportional to 21,293.30, 31,938.86 and 8,144.66 is: 12,216.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,293.30 : 31,938.86 = 8,144.66 : x
  2. Step 2: Convert to fraction form
    21,293.30/31,938.86 = 8,144.66/x
  3. Step 3: Cross multiply
    21,293.30x = 31,938.86 × 8,144.66
  4. Step 4: Simplify right side
    21,293.30x = 260,131,155.49
  5. Step 5: Solve for x
    x = 260,131,155.49/21,293.30
  6. Step 6: Final answer
    x = 12,216.57

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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.