Home / 10,428.85-15,641.64-3,408.80

Finding the Fourth Proportional to 10,428.85, 15,641.64 and 3,408.80

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Solution

The fourth proportional to 10,428.85, 15,641.64 and 3,408.80 is: 5,112.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,428.85 : 15,641.64 = 3,408.80 : x
  2. Step 2: Convert to fraction form
    10,428.85/15,641.64 = 3,408.80/x
  3. Step 3: Cross multiply
    10,428.85x = 15,641.64 × 3,408.80
  4. Step 4: Simplify right side
    10,428.85x = 53,319,222.43
  5. Step 5: Solve for x
    x = 53,319,222.43/10,428.85
  6. Step 6: Final answer
    x = 5,112.67

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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.