Home / 19,815.63-29,724.35-8,120.63

Finding the Fourth Proportional to 19,815.63, 29,724.35 and 8,120.63

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Solution

The fourth proportional to 19,815.63, 29,724.35 and 8,120.63 is: 12,181.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,815.63 : 29,724.35 = 8,120.63 : x
  2. Step 2: Convert to fraction form
    19,815.63/29,724.35 = 8,120.63/x
  3. Step 3: Cross multiply
    19,815.63x = 29,724.35 × 8,120.63
  4. Step 4: Simplify right side
    19,815.63x = 241,380,259.12
  5. Step 5: Solve for x
    x = 241,380,259.12/19,815.63
  6. Step 6: Final answer
    x = 12,181.31

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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.