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Finding the Fourth Proportional to 18,904.10, 28,361.00 and 7,210.94

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Solution

The fourth proportional to 18,904.10, 28,361.00 and 7,210.94 is: 10,818.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904.10 : 28,361.00 = 7,210.94 : x
  2. Step 2: Convert to fraction form
    18,904.10/28,361.00 = 7,210.94/x
  3. Step 3: Cross multiply
    18,904.10x = 28,361.00 × 7,210.94
  4. Step 4: Simplify right side
    18,904.10x = 204,509,345.56
  5. Step 5: Solve for x
    x = 204,509,345.56/18,904.10
  6. Step 6: Final answer
    x = 10,818.26

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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.