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Finding the Fourth Proportional to 19,389.51, 29,087.51 and 6,916.73

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Solution

The fourth proportional to 19,389.51, 29,087.51 and 6,916.73 is: 10,376.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,389.51 : 29,087.51 = 6,916.73 : x
  2. Step 2: Convert to fraction form
    19,389.51/29,087.51 = 6,916.73/x
  3. Step 3: Cross multiply
    19,389.51x = 29,087.51 × 6,916.73
  4. Step 4: Simplify right side
    19,389.51x = 201,190,273.02
  5. Step 5: Solve for x
    x = 201,190,273.02/19,389.51
  6. Step 6: Final answer
    x = 10,376.24

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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.