Home / 8,078.10-12,111.75-6,520.02

Finding the Fourth Proportional to 8,078.10, 12,111.75 and 6,520.02

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Solution

The fourth proportional to 8,078.10, 12,111.75 and 6,520.02 is: 9,775.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,078.10 : 12,111.75 = 6,520.02 : x
  2. Step 2: Convert to fraction form
    8,078.10/12,111.75 = 6,520.02/x
  3. Step 3: Cross multiply
    8,078.10x = 12,111.75 × 6,520.02
  4. Step 4: Simplify right side
    8,078.10x = 78,968,852.24
  5. Step 5: Solve for x
    x = 78,968,852.24/8,078.10
  6. Step 6: Final answer
    x = 9,775.67

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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.