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Finding the Fourth Proportional to 18,861.09, 26,028.20 and 10,247.20

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Solution

The fourth proportional to 18,861.09, 26,028.20 and 10,247.20 is: 14,141.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,861.09 : 26,028.20 = 10,247.20 : x
  2. Step 2: Convert to fraction form
    18,861.09/26,028.20 = 10,247.20/x
  3. Step 3: Cross multiply
    18,861.09x = 26,028.20 × 10,247.20
  4. Step 4: Simplify right side
    18,861.09x = 266,716,171.04
  5. Step 5: Solve for x
    x = 266,716,171.04/18,861.09
  6. Step 6: Final answer
    x = 14,141.08

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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.