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Finding the Fourth Proportional to 18,671.08, 28,006.62 and 4,819

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Solution

The fourth proportional to 18,671.08, 28,006.62 and 4,819 is: 7,228.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.08 : 28,006.62 = 4,819 : x
  2. Step 2: Convert to fraction form
    18,671.08/28,006.62 = 4,819/x
  3. Step 3: Cross multiply
    18,671.08x = 28,006.62 × 4,819
  4. Step 4: Simplify right side
    18,671.08x = 134,963,901.78
  5. Step 5: Solve for x
    x = 134,963,901.78/18,671.08
  6. Step 6: Final answer
    x = 7,228.50

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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.