Home / 12,489.78-18,734.66-3,730.84

Finding the Fourth Proportional to 12,489.78, 18,734.66 and 3,730.84

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Solution

The fourth proportional to 12,489.78, 18,734.66 and 3,730.84 is: 5,596.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.78 : 18,734.66 = 3,730.84 : x
  2. Step 2: Convert to fraction form
    12,489.78/18,734.66 = 3,730.84/x
  3. Step 3: Cross multiply
    12,489.78x = 18,734.66 × 3,730.84
  4. Step 4: Simplify right side
    12,489.78x = 69,896,018.91
  5. Step 5: Solve for x
    x = 69,896,018.91/12,489.78
  6. Step 6: Final answer
    x = 5,596.26

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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.