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Finding the Fourth Proportional to 18,787.19, 28,173.20 and 6,775.92

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Solution

The fourth proportional to 18,787.19, 28,173.20 and 6,775.92 is: 10,161.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.19 : 28,173.20 = 6,775.92 : x
  2. Step 2: Convert to fraction form
    18,787.19/28,173.20 = 6,775.92/x
  3. Step 3: Cross multiply
    18,787.19x = 28,173.20 × 6,775.92
  4. Step 4: Simplify right side
    18,787.19x = 190,899,315.46
  5. Step 5: Solve for x
    x = 190,899,315.46/18,787.19
  6. Step 6: Final answer
    x = 10,161.15

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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.