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Finding the Fourth Proportional to 19,038.62, 28,557.12 and 5,187.62

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Solution

The fourth proportional to 19,038.62, 28,557.12 and 5,187.62 is: 7,781.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,038.62 : 28,557.12 = 5,187.62 : x
  2. Step 2: Convert to fraction form
    19,038.62/28,557.12 = 5,187.62/x
  3. Step 3: Cross multiply
    19,038.62x = 28,557.12 × 5,187.62
  4. Step 4: Simplify right side
    19,038.62x = 148,143,486.85
  5. Step 5: Solve for x
    x = 148,143,486.85/19,038.62
  6. Step 6: Final answer
    x = 7,781.21

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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.