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Finding the Fourth Proportional to 18,904.41, 28,368.09 and 7,066.80

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Solution

The fourth proportional to 18,904.41, 28,368.09 and 7,066.80 is: 10,604.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904.41 : 28,368.09 = 7,066.80 : x
  2. Step 2: Convert to fraction form
    18,904.41/28,368.09 = 7,066.80/x
  3. Step 3: Cross multiply
    18,904.41x = 28,368.09 × 7,066.80
  4. Step 4: Simplify right side
    18,904.41x = 200,471,618.41
  5. Step 5: Solve for x
    x = 200,471,618.41/18,904.41
  6. Step 6: Final answer
    x = 10,604.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.