Home / 20,736.90-31,106.97-10,212.57

Finding the Fourth Proportional to 20,736.90, 31,106.97 and 10,212.57

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Solution

The fourth proportional to 20,736.90, 31,106.97 and 10,212.57 is: 15,319.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.90 : 31,106.97 = 10,212.57 : x
  2. Step 2: Convert to fraction form
    20,736.90/31,106.97 = 10,212.57/x
  3. Step 3: Cross multiply
    20,736.90x = 31,106.97 × 10,212.57
  4. Step 4: Simplify right side
    20,736.90x = 317,682,108.61
  5. Step 5: Solve for x
    x = 317,682,108.61/20,736.90
  6. Step 6: Final answer
    x = 15,319.65

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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.