Home / 25,438.21-38,118.57-12,939.50

Finding the Fourth Proportional to 25,438.21, 38,118.57 and 12,939.50

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Solution

The fourth proportional to 25,438.21, 38,118.57 and 12,939.50 is: 19,389.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,438.21 : 38,118.57 = 12,939.50 : x
  2. Step 2: Convert to fraction form
    25,438.21/38,118.57 = 12,939.50/x
  3. Step 3: Cross multiply
    25,438.21x = 38,118.57 × 12,939.50
  4. Step 4: Simplify right side
    25,438.21x = 493,235,236.52
  5. Step 5: Solve for x
    x = 493,235,236.52/25,438.21
  6. Step 6: Final answer
    x = 19,389.54

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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.