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Finding the Fourth Proportional to 12,810.69, 19,215.33 and 4,916.99

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Solution

The fourth proportional to 12,810.69, 19,215.33 and 4,916.99 is: 7,375.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,810.69 : 19,215.33 = 4,916.99 : x
  2. Step 2: Convert to fraction form
    12,810.69/19,215.33 = 4,916.99/x
  3. Step 3: Cross multiply
    12,810.69x = 19,215.33 × 4,916.99
  4. Step 4: Simplify right side
    12,810.69x = 94,481,489.38
  5. Step 5: Solve for x
    x = 94,481,489.38/12,810.69
  6. Step 6: Final answer
    x = 7,375.21

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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.