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Finding the Fourth Proportional to 21,896.48, 30,218.48 and 12,465.12

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Solution

The fourth proportional to 21,896.48, 30,218.48 and 12,465.12 is: 17,202.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,896.48 : 30,218.48 = 12,465.12 : x
  2. Step 2: Convert to fraction form
    21,896.48/30,218.48 = 12,465.12/x
  3. Step 3: Cross multiply
    21,896.48x = 30,218.48 × 12,465.12
  4. Step 4: Simplify right side
    21,896.48x = 376,676,979.42
  5. Step 5: Solve for x
    x = 376,676,979.42/21,896.48
  6. Step 6: Final answer
    x = 17,202.63

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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.