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Finding the Fourth Proportional to 20,477.58, 30,676.98 and 12,556.98

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Solution

The fourth proportional to 20,477.58, 30,676.98 and 12,556.98 is: 18,811.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,477.58 : 30,676.98 = 12,556.98 : x
  2. Step 2: Convert to fraction form
    20,477.58/30,676.98 = 12,556.98/x
  3. Step 3: Cross multiply
    20,477.58x = 30,676.98 × 12,556.98
  4. Step 4: Simplify right side
    20,477.58x = 385,210,224.32
  5. Step 5: Solve for x
    x = 385,210,224.32/20,477.58
  6. Step 6: Final answer
    x = 18,811.32

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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.