Home / 20,745.20-31,117.80-5,954.60

Finding the Fourth Proportional to 20,745.20, 31,117.80 and 5,954.60

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Solution

The fourth proportional to 20,745.20, 31,117.80 and 5,954.60 is: 8,931.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.20 : 31,117.80 = 5,954.60 : x
  2. Step 2: Convert to fraction form
    20,745.20/31,117.80 = 5,954.60/x
  3. Step 3: Cross multiply
    20,745.20x = 31,117.80 × 5,954.60
  4. Step 4: Simplify right side
    20,745.20x = 185,294,051.88
  5. Step 5: Solve for x
    x = 185,294,051.88/20,745.20
  6. Step 6: Final answer
    x = 8,931.90

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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.