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Finding the Fourth Proportional to 20,260.71, 30,400.16 and 12,863.19

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Solution

The fourth proportional to 20,260.71, 30,400.16 and 12,863.19 is: 19,300.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,260.71 : 30,400.16 = 12,863.19 : x
  2. Step 2: Convert to fraction form
    20,260.71/30,400.16 = 12,863.19/x
  3. Step 3: Cross multiply
    20,260.71x = 30,400.16 × 12,863.19
  4. Step 4: Simplify right side
    20,260.71x = 391,042,969.79
  5. Step 5: Solve for x
    x = 391,042,969.79/20,260.71
  6. Step 6: Final answer
    x = 19,300.56

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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.