Home / 20,749.80-31,101.42-8,266.50

Finding the Fourth Proportional to 20,749.80, 31,101.42 and 8,266.50

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Solution

The fourth proportional to 20,749.80, 31,101.42 and 8,266.50 is: 12,390.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.80 : 31,101.42 = 8,266.50 : x
  2. Step 2: Convert to fraction form
    20,749.80/31,101.42 = 8,266.50/x
  3. Step 3: Cross multiply
    20,749.80x = 31,101.42 × 8,266.50
  4. Step 4: Simplify right side
    20,749.80x = 257,099,888.43
  5. Step 5: Solve for x
    x = 257,099,888.43/20,749.80
  6. Step 6: Final answer
    x = 12,390.48

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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.