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Finding the Fourth Proportional to 20,293.90, 30,443.88 and 7,143.95

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Solution

The fourth proportional to 20,293.90, 30,443.88 and 7,143.95 is: 10,717.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,293.90 : 30,443.88 = 7,143.95 : x
  2. Step 2: Convert to fraction form
    20,293.90/30,443.88 = 7,143.95/x
  3. Step 3: Cross multiply
    20,293.90x = 30,443.88 × 7,143.95
  4. Step 4: Simplify right side
    20,293.90x = 217,489,659.43
  5. Step 5: Solve for x
    x = 217,489,659.43/20,293.90
  6. Step 6: Final answer
    x = 10,717.00

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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.