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Finding the Fourth Proportional to 19,139.51, 28,704.87 and 7,294.64

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Solution

The fourth proportional to 19,139.51, 28,704.87 and 7,294.64 is: 10,940.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,139.51 : 28,704.87 = 7,294.64 : x
  2. Step 2: Convert to fraction form
    19,139.51/28,704.87 = 7,294.64/x
  3. Step 3: Cross multiply
    19,139.51x = 28,704.87 × 7,294.64
  4. Step 4: Simplify right side
    19,139.51x = 209,391,549.37
  5. Step 5: Solve for x
    x = 209,391,549.37/19,139.51
  6. Step 6: Final answer
    x = 10,940.28

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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.