Home / 26,678.85-39,986.30-12,428.11

Finding the Fourth Proportional to 26,678.85, 39,986.30 and 12,428.11

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Solution

The fourth proportional to 26,678.85, 39,986.30 and 12,428.11 is: 18,627.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,678.85 : 39,986.30 = 12,428.11 : x
  2. Step 2: Convert to fraction form
    26,678.85/39,986.30 = 12,428.11/x
  3. Step 3: Cross multiply
    26,678.85x = 39,986.30 × 12,428.11
  4. Step 4: Simplify right side
    26,678.85x = 496,954,134.89
  5. Step 5: Solve for x
    x = 496,954,134.89/26,678.85
  6. Step 6: Final answer
    x = 18,627.27

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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.