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Finding the Fourth Proportional to 18,698.42, 25,751.31 and 18,290.18

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Solution

The fourth proportional to 18,698.42, 25,751.31 and 18,290.18 is: 25,189.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.42 : 25,751.31 = 18,290.18 : x
  2. Step 2: Convert to fraction form
    18,698.42/25,751.31 = 18,290.18/x
  3. Step 3: Cross multiply
    18,698.42x = 25,751.31 × 18,290.18
  4. Step 4: Simplify right side
    18,698.42x = 470,995,966.38
  5. Step 5: Solve for x
    x = 470,995,966.38/18,698.42
  6. Step 6: Final answer
    x = 25,189.09

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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.