Home / 20,419.30-30,630.09-7,271.67

Finding the Fourth Proportional to 20,419.30, 30,630.09 and 7,271.67

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Solution

The fourth proportional to 20,419.30, 30,630.09 and 7,271.67 is: 10,907.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.30 : 30,630.09 = 7,271.67 : x
  2. Step 2: Convert to fraction form
    20,419.30/30,630.09 = 7,271.67/x
  3. Step 3: Cross multiply
    20,419.30x = 30,630.09 × 7,271.67
  4. Step 4: Simplify right side
    20,419.30x = 222,731,753.40
  5. Step 5: Solve for x
    x = 222,731,753.40/20,419.30
  6. Step 6: Final answer
    x = 10,907.91

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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.