Home / 21,781.44-30,056.25-12,219.12

Finding the Fourth Proportional to 21,781.44, 30,056.25 and 12,219.12

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Solution

The fourth proportional to 21,781.44, 30,056.25 and 12,219.12 is: 16,861.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.44 : 30,056.25 = 12,219.12 : x
  2. Step 2: Convert to fraction form
    21,781.44/30,056.25 = 12,219.12/x
  3. Step 3: Cross multiply
    21,781.44x = 30,056.25 × 12,219.12
  4. Step 4: Simplify right side
    21,781.44x = 367,260,925.50
  5. Step 5: Solve for x
    x = 367,260,925.50/21,781.44
  6. Step 6: Final answer
    x = 16,861.19

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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.