Home / 21,158.70-29,202.12-12,204.45

Finding the Fourth Proportional to 21,158.70, 29,202.12 and 12,204.45

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Solution

The fourth proportional to 21,158.70, 29,202.12 and 12,204.45 is: 16,843.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.70 : 29,202.12 = 12,204.45 : x
  2. Step 2: Convert to fraction form
    21,158.70/29,202.12 = 12,204.45/x
  3. Step 3: Cross multiply
    21,158.70x = 29,202.12 × 12,204.45
  4. Step 4: Simplify right side
    21,158.70x = 356,395,813.43
  5. Step 5: Solve for x
    x = 356,395,813.43/21,158.70
  6. Step 6: Final answer
    x = 16,843.94

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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.