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Finding the Fourth Proportional to 21,753.70, 30,020.08 and 12,324.08

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Solution

The fourth proportional to 21,753.70, 30,020.08 and 12,324.08 is: 17,007.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,753.70 : 30,020.08 = 12,324.08 : x
  2. Step 2: Convert to fraction form
    21,753.70/30,020.08 = 12,324.08/x
  3. Step 3: Cross multiply
    21,753.70x = 30,020.08 × 12,324.08
  4. Step 4: Simplify right side
    21,753.70x = 369,969,867.53
  5. Step 5: Solve for x
    x = 369,969,867.53/21,753.70
  6. Step 6: Final answer
    x = 17,007.22

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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.