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Finding the Fourth Proportional to 18,755.40, 28,137.06 and 7,068.72

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Solution

The fourth proportional to 18,755.40, 28,137.06 and 7,068.72 is: 10,604.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,755.40 : 28,137.06 = 7,068.72 : x
  2. Step 2: Convert to fraction form
    18,755.40/28,137.06 = 7,068.72/x
  3. Step 3: Cross multiply
    18,755.40x = 28,137.06 × 7,068.72
  4. Step 4: Simplify right side
    18,755.40x = 198,892,998.76
  5. Step 5: Solve for x
    x = 198,892,998.76/18,755.40
  6. Step 6: Final answer
    x = 10,604.57

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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.