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Finding the Fourth Proportional to 18,283.80, 25,222.94 and 11,908.10

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Solution

The fourth proportional to 18,283.80, 25,222.94 and 11,908.10 is: 16,427.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,283.80 : 25,222.94 = 11,908.10 : x
  2. Step 2: Convert to fraction form
    18,283.80/25,222.94 = 11,908.10/x
  3. Step 3: Cross multiply
    18,283.80x = 25,222.94 × 11,908.10
  4. Step 4: Simplify right side
    18,283.80x = 300,357,291.81
  5. Step 5: Solve for x
    x = 300,357,291.81/18,283.80
  6. Step 6: Final answer
    x = 16,427.51

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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.