Home / 28,213.12-42,319.84-8,491.56

Finding the Fourth Proportional to 28,213.12, 42,319.84 and 8,491.56

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Solution

The fourth proportional to 28,213.12, 42,319.84 and 8,491.56 is: 12,737.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,213.12 : 42,319.84 = 8,491.56 : x
  2. Step 2: Convert to fraction form
    28,213.12/42,319.84 = 8,491.56/x
  3. Step 3: Cross multiply
    28,213.12x = 42,319.84 × 8,491.56
  4. Step 4: Simplify right side
    28,213.12x = 359,361,460.55
  5. Step 5: Solve for x
    x = 359,361,460.55/28,213.12
  6. Step 6: Final answer
    x = 12,737.39

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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.