Home / 13,721.70-20,582.55-8,181.30

Finding the Fourth Proportional to 13,721.70, 20,582.55 and 8,181.30

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Solution

The fourth proportional to 13,721.70, 20,582.55 and 8,181.30 is: 12,271.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.70 : 20,582.55 = 8,181.30 : x
  2. Step 2: Convert to fraction form
    13,721.70/20,582.55 = 8,181.30/x
  3. Step 3: Cross multiply
    13,721.70x = 20,582.55 × 8,181.30
  4. Step 4: Simplify right side
    13,721.70x = 168,392,016.32
  5. Step 5: Solve for x
    x = 168,392,016.32/13,721.70
  6. Step 6: Final answer
    x = 12,271.95

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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.