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Finding the Fourth Proportional to 15,752.92, 21,738.90 and 8,679.10

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Solution

The fourth proportional to 15,752.92, 21,738.90 and 8,679.10 is: 11,977.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,752.92 : 21,738.90 = 8,679.10 : x
  2. Step 2: Convert to fraction form
    15,752.92/21,738.90 = 8,679.10/x
  3. Step 3: Cross multiply
    15,752.92x = 21,738.90 × 8,679.10
  4. Step 4: Simplify right side
    15,752.92x = 188,674,086.99
  5. Step 5: Solve for x
    x = 188,674,086.99/15,752.92
  6. Step 6: Final answer
    x = 11,977.09

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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.