Home / 8,108.90-12,139.64-7,330.68

Finding the Fourth Proportional to 8,108.90, 12,139.64 and 7,330.68

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Solution

The fourth proportional to 8,108.90, 12,139.64 and 7,330.68 is: 10,974.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,108.90 : 12,139.64 = 7,330.68 : x
  2. Step 2: Convert to fraction form
    8,108.90/12,139.64 = 7,330.68/x
  3. Step 3: Cross multiply
    8,108.90x = 12,139.64 × 7,330.68
  4. Step 4: Simplify right side
    8,108.90x = 88,991,779.50
  5. Step 5: Solve for x
    x = 88,991,779.50/8,108.90
  6. Step 6: Final answer
    x = 10,974.59

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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.