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Finding the Fourth Proportional to 18,662.40, 25,587.90 and 18,370.80

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Solution

The fourth proportional to 18,662.40, 25,587.90 and 18,370.80 is: 25,188.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.40 : 25,587.90 = 18,370.80 : x
  2. Step 2: Convert to fraction form
    18,662.40/25,587.90 = 18,370.80/x
  3. Step 3: Cross multiply
    18,662.40x = 25,587.90 × 18,370.80
  4. Step 4: Simplify right side
    18,662.40x = 470,070,193.32
  5. Step 5: Solve for x
    x = 470,070,193.32/18,662.40
  6. Step 6: Final answer
    x = 25,188.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.