Home / 28,778.72-43,173.98-12,138.76

Finding the Fourth Proportional to 28,778.72, 43,173.98 and 12,138.76

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Solution

The fourth proportional to 28,778.72, 43,173.98 and 12,138.76 is: 18,210.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,778.72 : 43,173.98 = 12,138.76 : x
  2. Step 2: Convert to fraction form
    28,778.72/43,173.98 = 12,138.76/x
  3. Step 3: Cross multiply
    28,778.72x = 43,173.98 × 12,138.76
  4. Step 4: Simplify right side
    28,778.72x = 524,078,304.90
  5. Step 5: Solve for x
    x = 524,078,304.90/28,778.72
  6. Step 6: Final answer
    x = 18,210.62

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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.