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Finding the Fourth Proportional to 18,704.50, 28,068.90 and 9,470.50

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Solution

The fourth proportional to 18,704.50, 28,068.90 and 9,470.50 is: 14,211.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.50 : 28,068.90 = 9,470.50 : x
  2. Step 2: Convert to fraction form
    18,704.50/28,068.90 = 9,470.50/x
  3. Step 3: Cross multiply
    18,704.50x = 28,068.90 × 9,470.50
  4. Step 4: Simplify right side
    18,704.50x = 265,826,517.45
  5. Step 5: Solve for x
    x = 265,826,517.45/18,704.50
  6. Step 6: Final answer
    x = 14,211.90

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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.