Home / 28,403.75-42,611.10-12,821.39

Finding the Fourth Proportional to 28,403.75, 42,611.10 and 12,821.39

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Solution

The fourth proportional to 28,403.75, 42,611.10 and 12,821.39 is: 19,234.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,403.75 : 42,611.10 = 12,821.39 : x
  2. Step 2: Convert to fraction form
    28,403.75/42,611.10 = 12,821.39/x
  3. Step 3: Cross multiply
    28,403.75x = 42,611.10 × 12,821.39
  4. Step 4: Simplify right side
    28,403.75x = 546,333,531.43
  5. Step 5: Solve for x
    x = 546,333,531.43/28,403.75
  6. Step 6: Final answer
    x = 19,234.56

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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.