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Finding the Fourth Proportional to 18,669.56, 28,004.88 and 6,980.54

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Solution

The fourth proportional to 18,669.56, 28,004.88 and 6,980.54 is: 10,471.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,669.56 : 28,004.88 = 6,980.54 : x
  2. Step 2: Convert to fraction form
    18,669.56/28,004.88 = 6,980.54/x
  3. Step 3: Cross multiply
    18,669.56x = 28,004.88 × 6,980.54
  4. Step 4: Simplify right side
    18,669.56x = 195,489,185.04
  5. Step 5: Solve for x
    x = 195,489,185.04/18,669.56
  6. Step 6: Final answer
    x = 10,471.01

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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.