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Finding the Fourth Proportional to 20,047.29, 30,070.95 and 12,662.97

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Solution

The fourth proportional to 20,047.29, 30,070.95 and 12,662.97 is: 18,994.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,047.29 : 30,070.95 = 12,662.97 : x
  2. Step 2: Convert to fraction form
    20,047.29/30,070.95 = 12,662.97/x
  3. Step 3: Cross multiply
    20,047.29x = 30,070.95 × 12,662.97
  4. Step 4: Simplify right side
    20,047.29x = 380,787,537.72
  5. Step 5: Solve for x
    x = 380,787,537.72/20,047.29
  6. Step 6: Final answer
    x = 18,994.46

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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.