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Finding the Fourth Proportional to 18,771.40, 25,878.18 and 11,693.08

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Solution

The fourth proportional to 18,771.40, 25,878.18 and 11,693.08 is: 16,120.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.40 : 25,878.18 = 11,693.08 : x
  2. Step 2: Convert to fraction form
    18,771.40/25,878.18 = 11,693.08/x
  3. Step 3: Cross multiply
    18,771.40x = 25,878.18 × 11,693.08
  4. Step 4: Simplify right side
    18,771.40x = 302,595,628.99
  5. Step 5: Solve for x
    x = 302,595,628.99/18,771.40
  6. Step 6: Final answer
    x = 16,120.04

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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.