Home / 12,543.20-18,813.48-5,148.44

Finding the Fourth Proportional to 12,543.20, 18,813.48 and 5,148.44

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Solution

The fourth proportional to 12,543.20, 18,813.48 and 5,148.44 is: 7,722.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.20 : 18,813.48 = 5,148.44 : x
  2. Step 2: Convert to fraction form
    12,543.20/18,813.48 = 5,148.44/x
  3. Step 3: Cross multiply
    12,543.20x = 18,813.48 × 5,148.44
  4. Step 4: Simplify right side
    12,543.20x = 96,860,072.97
  5. Step 5: Solve for x
    x = 96,860,072.97/12,543.20
  6. Step 6: Final answer
    x = 7,722.12

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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.