Home / 21,778.68-30,056.04-12,219.45

Finding the Fourth Proportional to 21,778.68, 30,056.04 and 12,219.45

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Solution

The fourth proportional to 21,778.68, 30,056.04 and 12,219.45 is: 16,863.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,778.68 : 30,056.04 = 12,219.45 : x
  2. Step 2: Convert to fraction form
    21,778.68/30,056.04 = 12,219.45/x
  3. Step 3: Cross multiply
    21,778.68x = 30,056.04 × 12,219.45
  4. Step 4: Simplify right side
    21,778.68x = 367,268,277.98
  5. Step 5: Solve for x
    x = 367,268,277.98/21,778.68
  6. Step 6: Final answer
    x = 16,863.66

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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.