Home / 12,816.20-19,224.30-12,211.40

Finding the Fourth Proportional to 12,816.20, 19,224.30 and 12,211.40

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Solution

The fourth proportional to 12,816.20, 19,224.30 and 12,211.40 is: 18,317.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,816.20 : 19,224.30 = 12,211.40 : x
  2. Step 2: Convert to fraction form
    12,816.20/19,224.30 = 12,211.40/x
  3. Step 3: Cross multiply
    12,816.20x = 19,224.30 × 12,211.40
  4. Step 4: Simplify right side
    12,816.20x = 234,755,617.02
  5. Step 5: Solve for x
    x = 234,755,617.02/12,816.20
  6. Step 6: Final answer
    x = 18,317.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.