Home / 21,160.79-29,204.91-12,211.37

Finding the Fourth Proportional to 21,160.79, 29,204.91 and 12,211.37

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Solution

The fourth proportional to 21,160.79, 29,204.91 and 12,211.37 is: 16,853.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.79 : 29,204.91 = 12,211.37 : x
  2. Step 2: Convert to fraction form
    21,160.79/29,204.91 = 12,211.37/x
  3. Step 3: Cross multiply
    21,160.79x = 29,204.91 × 12,211.37
  4. Step 4: Simplify right side
    21,160.79x = 356,631,815.80
  5. Step 5: Solve for x
    x = 356,631,815.80/21,160.79
  6. Step 6: Final answer
    x = 16,853.43

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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.