Home / 12,181.05-18,271.62-4,390.47

Finding the Fourth Proportional to 12,181.05, 18,271.62 and 4,390.47

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Solution

The fourth proportional to 12,181.05, 18,271.62 and 4,390.47 is: 6,585.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,181.05 : 18,271.62 = 4,390.47 : x
  2. Step 2: Convert to fraction form
    12,181.05/18,271.62 = 4,390.47/x
  3. Step 3: Cross multiply
    12,181.05x = 18,271.62 × 4,390.47
  4. Step 4: Simplify right side
    12,181.05x = 80,220,999.46
  5. Step 5: Solve for x
    x = 80,220,999.46/12,181.05
  6. Step 6: Final answer
    x = 6,585.72

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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.