Home / 21,741.31-30,003.12-12,311.71

Finding the Fourth Proportional to 21,741.31, 30,003.12 and 12,311.71

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Solution

The fourth proportional to 21,741.31, 30,003.12 and 12,311.71 is: 16,990.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,741.31 : 30,003.12 = 12,311.71 : x
  2. Step 2: Convert to fraction form
    21,741.31/30,003.12 = 12,311.71/x
  3. Step 3: Cross multiply
    21,741.31x = 30,003.12 × 12,311.71
  4. Step 4: Simplify right side
    21,741.31x = 369,389,712.54
  5. Step 5: Solve for x
    x = 369,389,712.54/21,741.31
  6. Step 6: Final answer
    x = 16,990.22

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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.