Home / 20,975.23-28,949.96-12,028.78

Finding the Fourth Proportional to 20,975.23, 28,949.96 and 12,028.78

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Solution

The fourth proportional to 20,975.23, 28,949.96 and 12,028.78 is: 16,602.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.23 : 28,949.96 = 12,028.78 : x
  2. Step 2: Convert to fraction form
    20,975.23/28,949.96 = 12,028.78/x
  3. Step 3: Cross multiply
    20,975.23x = 28,949.96 × 12,028.78
  4. Step 4: Simplify right side
    20,975.23x = 348,232,494.96
  5. Step 5: Solve for x
    x = 348,232,494.96/20,975.23
  6. Step 6: Final answer
    x = 16,602.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.