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Finding the Fourth Proportional to 18,911.84, 28,372.31 and 5,763.41

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Solution

The fourth proportional to 18,911.84, 28,372.31 and 5,763.41 is: 8,646.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.84 : 28,372.31 = 5,763.41 : x
  2. Step 2: Convert to fraction form
    18,911.84/28,372.31 = 5,763.41/x
  3. Step 3: Cross multiply
    18,911.84x = 28,372.31 × 5,763.41
  4. Step 4: Simplify right side
    18,911.84x = 163,521,226.36
  5. Step 5: Solve for x
    x = 163,521,226.36/18,911.84
  6. Step 6: Final answer
    x = 8,646.50

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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.