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Finding the Fourth Proportional to 18,442.80, 25,453.20 and 10,486.20

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Solution

The fourth proportional to 18,442.80, 25,453.20 and 10,486.20 is: 14,472.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,442.80 : 25,453.20 = 10,486.20 : x
  2. Step 2: Convert to fraction form
    18,442.80/25,453.20 = 10,486.20/x
  3. Step 3: Cross multiply
    18,442.80x = 25,453.20 × 10,486.20
  4. Step 4: Simplify right side
    18,442.80x = 266,907,345.84
  5. Step 5: Solve for x
    x = 266,907,345.84/18,442.80
  6. Step 6: Final answer
    x = 14,472.17

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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.