Home / 26,018.80-39,018.60-8,489.20

Finding the Fourth Proportional to 26,018.80, 39,018.60 and 8,489.20

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Solution

The fourth proportional to 26,018.80, 39,018.60 and 8,489.20 is: 12,730.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,018.80 : 39,018.60 = 8,489.20 : x
  2. Step 2: Convert to fraction form
    26,018.80/39,018.60 = 8,489.20/x
  3. Step 3: Cross multiply
    26,018.80x = 39,018.60 × 8,489.20
  4. Step 4: Simplify right side
    26,018.80x = 331,236,699.12
  5. Step 5: Solve for x
    x = 331,236,699.12/26,018.80
  6. Step 6: Final answer
    x = 12,730.67

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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.