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Finding the Fourth Proportional to 19,015.65, 28,508.07 and 7,930.65

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Solution

The fourth proportional to 19,015.65, 28,508.07 and 7,930.65 is: 11,889.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,015.65 : 28,508.07 = 7,930.65 : x
  2. Step 2: Convert to fraction form
    19,015.65/28,508.07 = 7,930.65/x
  3. Step 3: Cross multiply
    19,015.65x = 28,508.07 × 7,930.65
  4. Step 4: Simplify right side
    19,015.65x = 226,087,525.35
  5. Step 5: Solve for x
    x = 226,087,525.35/19,015.65
  6. Step 6: Final answer
    x = 11,889.55

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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.