Home / 21,161.42-29,204.58-12,211.89

Finding the Fourth Proportional to 21,161.42, 29,204.58 and 12,211.89

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Solution

The fourth proportional to 21,161.42, 29,204.58 and 12,211.89 is: 16,853.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.42 : 29,204.58 = 12,211.89 : x
  2. Step 2: Convert to fraction form
    21,161.42/29,204.58 = 12,211.89/x
  3. Step 3: Cross multiply
    21,161.42x = 29,204.58 × 12,211.89
  4. Step 4: Simplify right side
    21,161.42x = 356,642,972.43
  5. Step 5: Solve for x
    x = 356,642,972.43/21,161.42
  6. Step 6: Final answer
    x = 16,853.45

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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.