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Finding the Fourth Proportional to 18,804.72, 28,210.80 and 8,416.56

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Solution

The fourth proportional to 18,804.72, 28,210.80 and 8,416.56 is: 12,626.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.72 : 28,210.80 = 8,416.56 : x
  2. Step 2: Convert to fraction form
    18,804.72/28,210.80 = 8,416.56/x
  3. Step 3: Cross multiply
    18,804.72x = 28,210.80 × 8,416.56
  4. Step 4: Simplify right side
    18,804.72x = 237,437,890.85
  5. Step 5: Solve for x
    x = 237,437,890.85/18,804.72
  6. Step 6: Final answer
    x = 12,626.50

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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.