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Finding the Fourth Proportional to 19,230.15, 28,848.20 and 8,136.90

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Solution

The fourth proportional to 19,230.15, 28,848.20 and 8,136.90 is: 12,206.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,230.15 : 28,848.20 = 8,136.90 : x
  2. Step 2: Convert to fraction form
    19,230.15/28,848.20 = 8,136.90/x
  3. Step 3: Cross multiply
    19,230.15x = 28,848.20 × 8,136.90
  4. Step 4: Simplify right side
    19,230.15x = 234,734,877.90
  5. Step 5: Solve for x
    x = 234,734,877.90/19,230.15
  6. Step 6: Final answer
    x = 12,206.61

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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.