Home / 28,697.21-42,974.22-18,135.36

Finding the Fourth Proportional to 28,697.21, 42,974.22 and 18,135.36

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Solution

The fourth proportional to 28,697.21, 42,974.22 and 18,135.36 is: 27,157.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,697.21 : 42,974.22 = 18,135.36 : x
  2. Step 2: Convert to fraction form
    28,697.21/42,974.22 = 18,135.36/x
  3. Step 3: Cross multiply
    28,697.21x = 42,974.22 × 18,135.36
  4. Step 4: Simplify right side
    28,697.21x = 779,353,149.77
  5. Step 5: Solve for x
    x = 779,353,149.77/28,697.21
  6. Step 6: Final answer
    x = 27,157.80

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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.