Home / 19,015.20-28,522.80-12,778.20

Finding the Fourth Proportional to 19,015.20, 28,522.80 and 12,778.20

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Solution

The fourth proportional to 19,015.20, 28,522.80 and 12,778.20 is: 19,167.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,015.20 : 28,522.80 = 12,778.20 : x
  2. Step 2: Convert to fraction form
    19,015.20/28,522.80 = 12,778.20/x
  3. Step 3: Cross multiply
    19,015.20x = 28,522.80 × 12,778.20
  4. Step 4: Simplify right side
    19,015.20x = 364,470,042.96
  5. Step 5: Solve for x
    x = 364,470,042.96/19,015.20
  6. Step 6: Final answer
    x = 19,167.30

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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.