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Finding the Fourth Proportional to 12,820.60, 19,233.60 and 3,935.20

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Solution

The fourth proportional to 12,820.60, 19,233.60 and 3,935.20 is: 5,903.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,820.60 : 19,233.60 = 3,935.20 : x
  2. Step 2: Convert to fraction form
    12,820.60/19,233.60 = 3,935.20/x
  3. Step 3: Cross multiply
    12,820.60x = 19,233.60 × 3,935.20
  4. Step 4: Simplify right side
    12,820.60x = 75,688,062.72
  5. Step 5: Solve for x
    x = 75,688,062.72/12,820.60
  6. Step 6: Final answer
    x = 5,903.63

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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.