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Finding the Fourth Proportional to 18,454.41, 27,639.99 and 8,572.89

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Solution

The fourth proportional to 18,454.41, 27,639.99 and 8,572.89 is: 12,840.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,454.41 : 27,639.99 = 8,572.89 : x
  2. Step 2: Convert to fraction form
    18,454.41/27,639.99 = 8,572.89/x
  3. Step 3: Cross multiply
    18,454.41x = 27,639.99 × 8,572.89
  4. Step 4: Simplify right side
    18,454.41x = 236,954,481.91
  5. Step 5: Solve for x
    x = 236,954,481.91/18,454.41
  6. Step 6: Final answer
    x = 12,840.00

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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.