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Finding the Fourth Proportional to 18,669.06, 28,004.13 and 6,980.04

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Solution

The fourth proportional to 18,669.06, 28,004.13 and 6,980.04 is: 10,470.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,669.06 : 28,004.13 = 6,980.04 : x
  2. Step 2: Convert to fraction form
    18,669.06/28,004.13 = 6,980.04/x
  3. Step 3: Cross multiply
    18,669.06x = 28,004.13 × 6,980.04
  4. Step 4: Simplify right side
    18,669.06x = 195,469,947.57
  5. Step 5: Solve for x
    x = 195,469,947.57/18,669.06
  6. Step 6: Final answer
    x = 10,470.26

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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.