Home / 28,443.40-42,688.34-20,131.48

Finding the Fourth Proportional to 28,443.40, 42,688.34 and 20,131.48

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Solution

The fourth proportional to 28,443.40, 42,688.34 and 20,131.48 is: 30,213.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,443.40 : 42,688.34 = 20,131.48 : x
  2. Step 2: Convert to fraction form
    28,443.40/42,688.34 = 20,131.48/x
  3. Step 3: Cross multiply
    28,443.40x = 42,688.34 × 20,131.48
  4. Step 4: Simplify right side
    28,443.40x = 859,379,462.94
  5. Step 5: Solve for x
    x = 859,379,462.94/28,443.40
  6. Step 6: Final answer
    x = 30,213.67

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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.