Home / 5,638.24-7,780.94-3,120.67

Finding the Fourth Proportional to 5,638.24, 7,780.94 and 3,120.67

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Solution

The fourth proportional to 5,638.24, 7,780.94 and 3,120.67 is: 4,306.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.24 : 7,780.94 = 3,120.67 : x
  2. Step 2: Convert to fraction form
    5,638.24/7,780.94 = 3,120.67/x
  3. Step 3: Cross multiply
    5,638.24x = 7,780.94 × 3,120.67
  4. Step 4: Simplify right side
    5,638.24x = 24,281,746.03
  5. Step 5: Solve for x
    x = 24,281,746.03/5,638.24
  6. Step 6: Final answer
    x = 4,306.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.