Home / 19,231.70-28,847.55-12,665.30

Finding the Fourth Proportional to 19,231.70, 28,847.55 and 12,665.30

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Solution

The fourth proportional to 19,231.70, 28,847.55 and 12,665.30 is: 18,997.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,231.70 : 28,847.55 = 12,665.30 : x
  2. Step 2: Convert to fraction form
    19,231.70/28,847.55 = 12,665.30/x
  3. Step 3: Cross multiply
    19,231.70x = 28,847.55 × 12,665.30
  4. Step 4: Simplify right side
    19,231.70x = 365,362,875.02
  5. Step 5: Solve for x
    x = 365,362,875.02/19,231.70
  6. Step 6: Final answer
    x = 18,997.95

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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.