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Finding the Fourth Proportional to 47,878.78, 71,817.15 and 12,818.44

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Solution

The fourth proportional to 47,878.78, 71,817.15 and 12,818.44 is: 19,227.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,878.78 : 71,817.15 = 12,818.44 : x
  2. Step 2: Convert to fraction form
    47,878.78/71,817.15 = 12,818.44/x
  3. Step 3: Cross multiply
    47,878.78x = 71,817.15 × 12,818.44
  4. Step 4: Simplify right side
    47,878.78x = 920,583,828.25
  5. Step 5: Solve for x
    x = 920,583,828.25/47,878.78
  6. Step 6: Final answer
    x = 19,227.39

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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.