Home / 20,556.39-30,815.73-7,405.56

Finding the Fourth Proportional to 20,556.39, 30,815.73 and 7,405.56

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Solution

The fourth proportional to 20,556.39, 30,815.73 and 7,405.56 is: 11,101.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556.39 : 30,815.73 = 7,405.56 : x
  2. Step 2: Convert to fraction form
    20,556.39/30,815.73 = 7,405.56/x
  3. Step 3: Cross multiply
    20,556.39x = 30,815.73 × 7,405.56
  4. Step 4: Simplify right side
    20,556.39x = 228,207,737.46
  5. Step 5: Solve for x
    x = 228,207,737.46/20,556.39
  6. Step 6: Final answer
    x = 11,101.55

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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.