Home / 20,552.35-30,771.27-13,138.51

Finding the Fourth Proportional to 20,552.35, 30,771.27 and 13,138.51

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Solution

The fourth proportional to 20,552.35, 30,771.27 and 13,138.51 is: 19,671.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,552.35 : 30,771.27 = 13,138.51 : x
  2. Step 2: Convert to fraction form
    20,552.35/30,771.27 = 13,138.51/x
  3. Step 3: Cross multiply
    20,552.35x = 30,771.27 × 13,138.51
  4. Step 4: Simplify right side
    20,552.35x = 404,288,638.61
  5. Step 5: Solve for x
    x = 404,288,638.61/20,552.35
  6. Step 6: Final answer
    x = 19,671.16

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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.