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Finding the Fourth Proportional to 18,858.66, 28,288.94 and 4,818.80

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Solution

The fourth proportional to 18,858.66, 28,288.94 and 4,818.80 is: 7,228.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.66 : 28,288.94 = 4,818.80 : x
  2. Step 2: Convert to fraction form
    18,858.66/28,288.94 = 4,818.80/x
  3. Step 3: Cross multiply
    18,858.66x = 28,288.94 × 4,818.80
  4. Step 4: Simplify right side
    18,858.66x = 136,318,578.53
  5. Step 5: Solve for x
    x = 136,318,578.53/18,858.66
  6. Step 6: Final answer
    x = 7,228.43

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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.