Home / 19,215.78-28,840.14-13,682.67

Finding the Fourth Proportional to 19,215.78, 28,840.14 and 13,682.67

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Solution

The fourth proportional to 19,215.78, 28,840.14 and 13,682.67 is: 20,535.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,215.78 : 28,840.14 = 13,682.67 : x
  2. Step 2: Convert to fraction form
    19,215.78/28,840.14 = 13,682.67/x
  3. Step 3: Cross multiply
    19,215.78x = 28,840.14 × 13,682.67
  4. Step 4: Simplify right side
    19,215.78x = 394,610,118.37
  5. Step 5: Solve for x
    x = 394,610,118.37/19,215.78
  6. Step 6: Final answer
    x = 20,535.73

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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.