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Finding the Fourth Proportional to 18,698.91, 25,752.01 and 18,290.67

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Solution

The fourth proportional to 18,698.91, 25,752.01 and 18,290.67 is: 25,189.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.91 : 25,752.01 = 18,290.67 : x
  2. Step 2: Convert to fraction form
    18,698.91/25,752.01 = 18,290.67/x
  3. Step 3: Cross multiply
    18,698.91x = 25,752.01 × 18,290.67
  4. Step 4: Simplify right side
    18,698.91x = 471,021,516.75
  5. Step 5: Solve for x
    x = 471,021,516.75/18,698.91
  6. Step 6: Final answer
    x = 25,189.78

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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.