Home / 22,285.36-30,755.64-12,728.20

Finding the Fourth Proportional to 22,285.36, 30,755.64 and 12,728.20

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Solution

The fourth proportional to 22,285.36, 30,755.64 and 12,728.20 is: 17,565.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,285.36 : 30,755.64 = 12,728.20 : x
  2. Step 2: Convert to fraction form
    22,285.36/30,755.64 = 12,728.20/x
  3. Step 3: Cross multiply
    22,285.36x = 30,755.64 × 12,728.20
  4. Step 4: Simplify right side
    22,285.36x = 391,463,937.05
  5. Step 5: Solve for x
    x = 391,463,937.05/22,285.36
  6. Step 6: Final answer
    x = 17,565.97

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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.