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Finding the Fourth Proportional to 19,167.15, 28,750.82 and 6,687.28

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Solution

The fourth proportional to 19,167.15, 28,750.82 and 6,687.28 is: 10,030.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,167.15 : 28,750.82 = 6,687.28 : x
  2. Step 2: Convert to fraction form
    19,167.15/28,750.82 = 6,687.28/x
  3. Step 3: Cross multiply
    19,167.15x = 28,750.82 × 6,687.28
  4. Step 4: Simplify right side
    19,167.15x = 192,264,783.57
  5. Step 5: Solve for x
    x = 192,264,783.57/19,167.15
  6. Step 6: Final answer
    x = 10,030.95

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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.