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Finding the Fourth Proportional to 15,143.80, 22,701.73 and 8,128.73

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Solution

The fourth proportional to 15,143.80, 22,701.73 and 8,128.73 is: 12,185.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,143.80 : 22,701.73 = 8,128.73 : x
  2. Step 2: Convert to fraction form
    15,143.80/22,701.73 = 8,128.73/x
  3. Step 3: Cross multiply
    15,143.80x = 22,701.73 × 8,128.73
  4. Step 4: Simplify right side
    15,143.80x = 184,536,233.70
  5. Step 5: Solve for x
    x = 184,536,233.70/15,143.80
  6. Step 6: Final answer
    x = 12,185.60

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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.