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Finding the Fourth Proportional to 21,777.29, 30,052.98 and 12,219.29

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Solution

The fourth proportional to 21,777.29, 30,052.98 and 12,219.29 is: 16,862.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,777.29 : 30,052.98 = 12,219.29 : x
  2. Step 2: Convert to fraction form
    21,777.29/30,052.98 = 12,219.29/x
  3. Step 3: Cross multiply
    21,777.29x = 30,052.98 × 12,219.29
  4. Step 4: Simplify right side
    21,777.29x = 367,225,866.62
  5. Step 5: Solve for x
    x = 367,225,866.62/21,777.29
  6. Step 6: Final answer
    x = 16,862.79

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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.