Home / 28,161.26-42,240.26-8,440.20

Finding the Fourth Proportional to 28,161.26, 42,240.26 and 8,440.20

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Solution

The fourth proportional to 28,161.26, 42,240.26 and 8,440.20 is: 12,659.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,161.26 : 42,240.26 = 8,440.20 : x
  2. Step 2: Convert to fraction form
    28,161.26/42,240.26 = 8,440.20/x
  3. Step 3: Cross multiply
    28,161.26x = 42,240.26 × 8,440.20
  4. Step 4: Simplify right side
    28,161.26x = 356,516,242.45
  5. Step 5: Solve for x
    x = 356,516,242.45/28,161.26
  6. Step 6: Final answer
    x = 12,659.81

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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.