Home / 28,114.70-42,172.79-12,311.56

Finding the Fourth Proportional to 28,114.70, 42,172.79 and 12,311.56

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Solution

The fourth proportional to 28,114.70, 42,172.79 and 12,311.56 is: 18,467.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,114.70 : 42,172.79 = 12,311.56 : x
  2. Step 2: Convert to fraction form
    28,114.70/42,172.79 = 12,311.56/x
  3. Step 3: Cross multiply
    28,114.70x = 42,172.79 × 12,311.56
  4. Step 4: Simplify right side
    28,114.70x = 519,212,825.61
  5. Step 5: Solve for x
    x = 519,212,825.61/28,114.70
  6. Step 6: Final answer
    x = 18,467.67

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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.