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Finding the Fourth Proportional to 18,965, 26,171.70 and 10,581.50

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Solution

The fourth proportional to 18,965, 26,171.70 and 10,581.50 is: 14,602.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965 : 26,171.70 = 10,581.50 : x
  2. Step 2: Convert to fraction form
    18,965/26,171.70 = 10,581.50/x
  3. Step 3: Cross multiply
    18,965x = 26,171.70 × 10,581.50
  4. Step 4: Simplify right side
    18,965x = 276,935,843.55
  5. Step 5: Solve for x
    x = 276,935,843.55/18,965
  6. Step 6: Final answer
    x = 14,602.47

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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.