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Finding the Fourth Proportional to 18,830.46, 28,208.03 and 11,329.88

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Solution

The fourth proportional to 18,830.46, 28,208.03 and 11,329.88 is: 16,972.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,830.46 : 28,208.03 = 11,329.88 : x
  2. Step 2: Convert to fraction form
    18,830.46/28,208.03 = 11,329.88/x
  3. Step 3: Cross multiply
    18,830.46x = 28,208.03 × 11,329.88
  4. Step 4: Simplify right side
    18,830.46x = 319,593,594.94
  5. Step 5: Solve for x
    x = 319,593,594.94/18,830.46
  6. Step 6: Final answer
    x = 16,972.17

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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.