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Finding the Fourth Proportional to 21,777.44, 30,053.19 and 12,219.44

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Solution

The fourth proportional to 21,777.44, 30,053.19 and 12,219.44 is: 16,863.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,777.44 : 30,053.19 = 12,219.44 : x
  2. Step 2: Convert to fraction form
    21,777.44/30,053.19 = 12,219.44/x
  3. Step 3: Cross multiply
    21,777.44x = 30,053.19 × 12,219.44
  4. Step 4: Simplify right side
    21,777.44x = 367,233,001.75
  5. Step 5: Solve for x
    x = 367,233,001.75/21,777.44
  6. Step 6: Final answer
    x = 16,863.01

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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.