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Finding the Fourth Proportional to 18,782.96, 28,188.72 and 6,947.93

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Solution

The fourth proportional to 18,782.96, 28,188.72 and 6,947.93 is: 10,427.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782.96 : 28,188.72 = 6,947.93 : x
  2. Step 2: Convert to fraction form
    18,782.96/28,188.72 = 6,947.93/x
  3. Step 3: Cross multiply
    18,782.96x = 28,188.72 × 6,947.93
  4. Step 4: Simplify right side
    18,782.96x = 195,853,323.82
  5. Step 5: Solve for x
    x = 195,853,323.82/18,782.96
  6. Step 6: Final answer
    x = 10,427.18

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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.