Home / 21,631.40-29,851.44-12,072.20

Finding the Fourth Proportional to 21,631.40, 29,851.44 and 12,072.20

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Solution

The fourth proportional to 21,631.40, 29,851.44 and 12,072.20 is: 16,659.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,631.40 : 29,851.44 = 12,072.20 : x
  2. Step 2: Convert to fraction form
    21,631.40/29,851.44 = 12,072.20/x
  3. Step 3: Cross multiply
    21,631.40x = 29,851.44 × 12,072.20
  4. Step 4: Simplify right side
    21,631.40x = 360,372,553.97
  5. Step 5: Solve for x
    x = 360,372,553.97/21,631.40
  6. Step 6: Final answer
    x = 16,659.70

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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.