Home / 20,886.35-31,329.45-5,091.20

Finding the Fourth Proportional to 20,886.35, 31,329.45 and 5,091.20

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Solution

The fourth proportional to 20,886.35, 31,329.45 and 5,091.20 is: 7,636.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.35 : 31,329.45 = 5,091.20 : x
  2. Step 2: Convert to fraction form
    20,886.35/31,329.45 = 5,091.20/x
  3. Step 3: Cross multiply
    20,886.35x = 31,329.45 × 5,091.20
  4. Step 4: Simplify right side
    20,886.35x = 159,504,495.84
  5. Step 5: Solve for x
    x = 159,504,495.84/20,886.35
  6. Step 6: Final answer
    x = 7,636.78

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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.