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Finding the Fourth Proportional to 54,318.70, 81,486.15 and 19,255.60

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Solution

The fourth proportional to 54,318.70, 81,486.15 and 19,255.60 is: 28,886.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,318.70 : 81,486.15 = 19,255.60 : x
  2. Step 2: Convert to fraction form
    54,318.70/81,486.15 = 19,255.60/x
  3. Step 3: Cross multiply
    54,318.70x = 81,486.15 × 19,255.60
  4. Step 4: Simplify right side
    54,318.70x = 1,569,064,709.94
  5. Step 5: Solve for x
    x = 1,569,064,709.94/54,318.70
  6. Step 6: Final answer
    x = 28,886.27

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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.