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Finding the Fourth Proportional to 18,455.81, 25,469.02 and 11,386.34

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Solution

The fourth proportional to 18,455.81, 25,469.02 and 11,386.34 is: 15,713.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,455.81 : 25,469.02 = 11,386.34 : x
  2. Step 2: Convert to fraction form
    18,455.81/25,469.02 = 11,386.34/x
  3. Step 3: Cross multiply
    18,455.81x = 25,469.02 × 11,386.34
  4. Step 4: Simplify right side
    18,455.81x = 289,998,921.19
  5. Step 5: Solve for x
    x = 289,998,921.19/18,455.81
  6. Step 6: Final answer
    x = 15,713.15

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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.