Home / 20,279.94-30,416.58-7,129.23

Finding the Fourth Proportional to 20,279.94, 30,416.58 and 7,129.23

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Solution

The fourth proportional to 20,279.94, 30,416.58 and 7,129.23 is: 10,692.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.94 : 30,416.58 = 7,129.23 : x
  2. Step 2: Convert to fraction form
    20,279.94/30,416.58 = 7,129.23/x
  3. Step 3: Cross multiply
    20,279.94x = 30,416.58 × 7,129.23
  4. Step 4: Simplify right side
    20,279.94x = 216,846,794.63
  5. Step 5: Solve for x
    x = 216,846,794.63/20,279.94
  6. Step 6: Final answer
    x = 10,692.67

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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.