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Finding the Fourth Proportional to 18,221.61, 25,145.91 and 10,263.99

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Solution

The fourth proportional to 18,221.61, 25,145.91 and 10,263.99 is: 14,164.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,221.61 : 25,145.91 = 10,263.99 : x
  2. Step 2: Convert to fraction form
    18,221.61/25,145.91 = 10,263.99/x
  3. Step 3: Cross multiply
    18,221.61x = 25,145.91 × 10,263.99
  4. Step 4: Simplify right side
    18,221.61x = 258,097,368.78
  5. Step 5: Solve for x
    x = 258,097,368.78/18,221.61
  6. Step 6: Final answer
    x = 14,164.36

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.