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Finding the Fourth Proportional to 19,339.74, 28,983.69 and 8,928.54

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Solution

The fourth proportional to 19,339.74, 28,983.69 and 8,928.54 is: 13,380.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,339.74 : 28,983.69 = 8,928.54 : x
  2. Step 2: Convert to fraction form
    19,339.74/28,983.69 = 8,928.54/x
  3. Step 3: Cross multiply
    19,339.74x = 28,983.69 × 8,928.54
  4. Step 4: Simplify right side
    19,339.74x = 258,782,035.51
  5. Step 5: Solve for x
    x = 258,782,035.51/19,339.74
  6. Step 6: Final answer
    x = 13,380.84

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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.