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Finding the Fourth Proportional to 19,211.65, 28,797.74 and 7,362.21

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Solution

The fourth proportional to 19,211.65, 28,797.74 and 7,362.21 is: 11,035.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,211.65 : 28,797.74 = 7,362.21 : x
  2. Step 2: Convert to fraction form
    19,211.65/28,797.74 = 7,362.21/x
  3. Step 3: Cross multiply
    19,211.65x = 28,797.74 × 7,362.21
  4. Step 4: Simplify right side
    19,211.65x = 212,015,009.41
  5. Step 5: Solve for x
    x = 212,015,009.41/19,211.65
  6. Step 6: Final answer
    x = 11,035.75

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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.