Home / 8,219.13-12,312.40-3,830.55

Finding the Fourth Proportional to 8,219.13, 12,312.40 and 3,830.55

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Solution

The fourth proportional to 8,219.13, 12,312.40 and 3,830.55 is: 5,738.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,219.13 : 12,312.40 = 3,830.55 : x
  2. Step 2: Convert to fraction form
    8,219.13/12,312.40 = 3,830.55/x
  3. Step 3: Cross multiply
    8,219.13x = 12,312.40 × 3,830.55
  4. Step 4: Simplify right side
    8,219.13x = 47,163,183.11
  5. Step 5: Solve for x
    x = 47,163,183.11/8,219.13
  6. Step 6: Final answer
    x = 5,738.22

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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.