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Finding the Fourth Proportional to 19,059.72, 28,590 and 5,208.72

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Solution

The fourth proportional to 19,059.72, 28,590 and 5,208.72 is: 7,813.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,059.72 : 28,590 = 5,208.72 : x
  2. Step 2: Convert to fraction form
    19,059.72/28,590 = 5,208.72/x
  3. Step 3: Cross multiply
    19,059.72x = 28,590 × 5,208.72
  4. Step 4: Simplify right side
    19,059.72x = 148,917,304.80
  5. Step 5: Solve for x
    x = 148,917,304.80/19,059.72
  6. Step 6: Final answer
    x = 7,813.19

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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.