Home / 28,138.88-42,209.73-8,417.61

Finding the Fourth Proportional to 28,138.88, 42,209.73 and 8,417.61

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Solution

The fourth proportional to 28,138.88, 42,209.73 and 8,417.61 is: 12,626.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,138.88 : 42,209.73 = 8,417.61 : x
  2. Step 2: Convert to fraction form
    28,138.88/42,209.73 = 8,417.61/x
  3. Step 3: Cross multiply
    28,138.88x = 42,209.73 × 8,417.61
  4. Step 4: Simplify right side
    28,138.88x = 355,305,045.35
  5. Step 5: Solve for x
    x = 355,305,045.35/28,138.88
  6. Step 6: Final answer
    x = 12,626.84

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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.