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Finding the Fourth Proportional to 28,667.88, 42,976.17 and 11,133.54

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Solution

The fourth proportional to 28,667.88, 42,976.17 and 11,133.54 is: 16,690.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,667.88 : 42,976.17 = 11,133.54 : x
  2. Step 2: Convert to fraction form
    28,667.88/42,976.17 = 11,133.54/x
  3. Step 3: Cross multiply
    28,667.88x = 42,976.17 × 11,133.54
  4. Step 4: Simplify right side
    28,667.88x = 478,476,907.74
  5. Step 5: Solve for x
    x = 478,476,907.74/28,667.88
  6. Step 6: Final answer
    x = 16,690.35

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1.5x scale

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.