Home / 20,984.10-31,460.74-9,884.54

Finding the Fourth Proportional to 20,984.10, 31,460.74 and 9,884.54

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Solution

The fourth proportional to 20,984.10, 31,460.74 and 9,884.54 is: 14,819.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,984.10 : 31,460.74 = 9,884.54 : x
  2. Step 2: Convert to fraction form
    20,984.10/31,460.74 = 9,884.54/x
  3. Step 3: Cross multiply
    20,984.10x = 31,460.74 × 9,884.54
  4. Step 4: Simplify right side
    20,984.10x = 310,974,942.96
  5. Step 5: Solve for x
    x = 310,974,942.96/20,984.10
  6. Step 6: Final answer
    x = 14,819.55

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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.