Home / 20,894.05-31,368.89-12,135.25

Finding the Fourth Proportional to 20,894.05, 31,368.89 and 12,135.25

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Solution

The fourth proportional to 20,894.05, 31,368.89 and 12,135.25 is: 18,219.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,894.05 : 31,368.89 = 12,135.25 : x
  2. Step 2: Convert to fraction form
    20,894.05/31,368.89 = 12,135.25/x
  3. Step 3: Cross multiply
    20,894.05x = 31,368.89 × 12,135.25
  4. Step 4: Simplify right side
    20,894.05x = 380,669,322.37
  5. Step 5: Solve for x
    x = 380,669,322.37/20,894.05
  6. Step 6: Final answer
    x = 18,219.03

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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.