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Finding the Fourth Proportional to 21,618.99, 32,443.07 and 8,469.72

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Solution

The fourth proportional to 21,618.99, 32,443.07 and 8,469.72 is: 12,710.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.99 : 32,443.07 = 8,469.72 : x
  2. Step 2: Convert to fraction form
    21,618.99/32,443.07 = 8,469.72/x
  3. Step 3: Cross multiply
    21,618.99x = 32,443.07 × 8,469.72
  4. Step 4: Simplify right side
    21,618.99x = 274,783,676.49
  5. Step 5: Solve for x
    x = 274,783,676.49/21,618.99
  6. Step 6: Final answer
    x = 12,710.29

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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.