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Finding the Fourth Proportional to 19,009.19, 28,518.64 and 7,912.19

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Solution

The fourth proportional to 19,009.19, 28,518.64 and 7,912.19 is: 11,870.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,009.19 : 28,518.64 = 7,912.19 : x
  2. Step 2: Convert to fraction form
    19,009.19/28,518.64 = 7,912.19/x
  3. Step 3: Cross multiply
    19,009.19x = 28,518.64 × 7,912.19
  4. Step 4: Simplify right side
    19,009.19x = 225,644,735.85
  5. Step 5: Solve for x
    x = 225,644,735.85/19,009.19
  6. Step 6: Final answer
    x = 11,870.30

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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.