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Finding the Fourth Proportional to 19,306.72, 28,928.28 and 17,692.72

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Solution

The fourth proportional to 19,306.72, 28,928.28 and 17,692.72 is: 26,509.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,306.72 : 28,928.28 = 17,692.72 : x
  2. Step 2: Convert to fraction form
    19,306.72/28,928.28 = 17,692.72/x
  3. Step 3: Cross multiply
    19,306.72x = 28,928.28 × 17,692.72
  4. Step 4: Simplify right side
    19,306.72x = 511,819,958.12
  5. Step 5: Solve for x
    x = 511,819,958.12/19,306.72
  6. Step 6: Final answer
    x = 26,509.94

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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.