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Finding the Fourth Proportional to 18,442.79, 25,453.20 and 10,486.21

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Solution

The fourth proportional to 18,442.79, 25,453.20 and 10,486.21 is: 14,472.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,442.79 : 25,453.20 = 10,486.21 : x
  2. Step 2: Convert to fraction form
    18,442.79/25,453.20 = 10,486.21/x
  3. Step 3: Cross multiply
    18,442.79x = 25,453.20 × 10,486.21
  4. Step 4: Simplify right side
    18,442.79x = 266,907,600.37
  5. Step 5: Solve for x
    x = 266,907,600.37/18,442.79
  6. Step 6: Final answer
    x = 14,472.19

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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.