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Finding the Fourth Proportional to 14,907.89, 20,571.68 and 8,620.67

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Solution

The fourth proportional to 14,907.89, 20,571.68 and 8,620.67 is: 11,895.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,907.89 : 20,571.68 = 8,620.67 : x
  2. Step 2: Convert to fraction form
    14,907.89/20,571.68 = 8,620.67/x
  3. Step 3: Cross multiply
    14,907.89x = 20,571.68 × 8,620.67
  4. Step 4: Simplify right side
    14,907.89x = 177,341,518.66
  5. Step 5: Solve for x
    x = 177,341,518.66/14,907.89
  6. Step 6: Final answer
    x = 11,895.82

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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.