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Finding the Fourth Proportional to 14,787.06, 20,406.15 and 8,499.06

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Solution

The fourth proportional to 14,787.06, 20,406.15 and 8,499.06 is: 11,728.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,787.06 : 20,406.15 = 8,499.06 : x
  2. Step 2: Convert to fraction form
    14,787.06/20,406.15 = 8,499.06/x
  3. Step 3: Cross multiply
    14,787.06x = 20,406.15 × 8,499.06
  4. Step 4: Simplify right side
    14,787.06x = 173,433,093.22
  5. Step 5: Solve for x
    x = 173,433,093.22/14,787.06
  6. Step 6: Final answer
    x = 11,728.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.