Home / 13,355.96-20,135.36-12,641.54

Finding the Fourth Proportional to 13,355.96, 20,135.36 and 12,641.54

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Solution

The fourth proportional to 13,355.96, 20,135.36 and 12,641.54 is: 19,058.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.96 : 20,135.36 = 12,641.54 : x
  2. Step 2: Convert to fraction form
    13,355.96/20,135.36 = 12,641.54/x
  3. Step 3: Cross multiply
    13,355.96x = 20,135.36 × 12,641.54
  4. Step 4: Simplify right side
    13,355.96x = 254,541,958.85
  5. Step 5: Solve for x
    x = 254,541,958.85/13,355.96
  6. Step 6: Final answer
    x = 19,058.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.