Home / 21,012.18-31,516.35-12,241.62

Finding the Fourth Proportional to 21,012.18, 31,516.35 and 12,241.62

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Solution

The fourth proportional to 21,012.18, 31,516.35 and 12,241.62 is: 18,361.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.18 : 31,516.35 = 12,241.62 : x
  2. Step 2: Convert to fraction form
    21,012.18/31,516.35 = 12,241.62/x
  3. Step 3: Cross multiply
    21,012.18x = 31,516.35 × 12,241.62
  4. Step 4: Simplify right side
    21,012.18x = 385,811,180.49
  5. Step 5: Solve for x
    x = 385,811,180.49/21,012.18
  6. Step 6: Final answer
    x = 18,361.31

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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.