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Finding the Fourth Proportional to 28,414.21, 42,619.77 and 8,692.76

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Solution

The fourth proportional to 28,414.21, 42,619.77 and 8,692.76 is: 13,038.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,414.21 : 42,619.77 = 8,692.76 : x
  2. Step 2: Convert to fraction form
    28,414.21/42,619.77 = 8,692.76/x
  3. Step 3: Cross multiply
    28,414.21x = 42,619.77 × 8,692.76
  4. Step 4: Simplify right side
    28,414.21x = 370,483,431.87
  5. Step 5: Solve for x
    x = 370,483,431.87/28,414.21
  6. Step 6: Final answer
    x = 13,038.67

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1.5x scale

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.