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Finding the Fourth Proportional to 21,701.89, 29,949.24 and 12,270.25

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Solution

The fourth proportional to 21,701.89, 29,949.24 and 12,270.25 is: 16,933.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,701.89 : 29,949.24 = 12,270.25 : x
  2. Step 2: Convert to fraction form
    21,701.89/29,949.24 = 12,270.25/x
  3. Step 3: Cross multiply
    21,701.89x = 29,949.24 × 12,270.25
  4. Step 4: Simplify right side
    21,701.89x = 367,484,662.11
  5. Step 5: Solve for x
    x = 367,484,662.11/21,701.89
  6. Step 6: Final answer
    x = 16,933.30

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Double scale
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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.