Home / 13,565.34-20,349.83-12,745.21

Finding the Fourth Proportional to 13,565.34, 20,349.83 and 12,745.21

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Solution

The fourth proportional to 13,565.34, 20,349.83 and 12,745.21 is: 19,119.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,565.34 : 20,349.83 = 12,745.21 : x
  2. Step 2: Convert to fraction form
    13,565.34/20,349.83 = 12,745.21/x
  3. Step 3: Cross multiply
    13,565.34x = 20,349.83 × 12,745.21
  4. Step 4: Simplify right side
    13,565.34x = 259,362,856.81
  5. Step 5: Solve for x
    x = 259,362,856.81/13,565.34
  6. Step 6: Final answer
    x = 19,119.52

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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.