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Finding the Fourth Proportional to 21,269.70, 29,344.29 and 21,236.90

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Solution

The fourth proportional to 21,269.70, 29,344.29 and 21,236.90 is: 29,299.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.70 : 29,344.29 = 21,236.90 : x
  2. Step 2: Convert to fraction form
    21,269.70/29,344.29 = 21,236.90/x
  3. Step 3: Cross multiply
    21,269.70x = 29,344.29 × 21,236.90
  4. Step 4: Simplify right side
    21,269.70x = 623,181,605.58
  5. Step 5: Solve for x
    x = 623,181,605.58/21,269.70
  6. Step 6: Final answer
    x = 29,299.03

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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.