Home / 20,900.60-31,336.31-7,749.44

Finding the Fourth Proportional to 20,900.60, 31,336.31 and 7,749.44

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Solution

The fourth proportional to 20,900.60, 31,336.31 and 7,749.44 is: 11,618.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.60 : 31,336.31 = 7,749.44 : x
  2. Step 2: Convert to fraction form
    20,900.60/31,336.31 = 7,749.44/x
  3. Step 3: Cross multiply
    20,900.60x = 31,336.31 × 7,749.44
  4. Step 4: Simplify right side
    20,900.60x = 242,838,697.48
  5. Step 5: Solve for x
    x = 242,838,697.48/20,900.60
  6. Step 6: Final answer
    x = 11,618.75

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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.