Home / 28,647.75-42,988.91-12,231.75

Finding the Fourth Proportional to 28,647.75, 42,988.91 and 12,231.75

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Solution

The fourth proportional to 28,647.75, 42,988.91 and 12,231.75 is: 18,355.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,647.75 : 42,988.91 = 12,231.75 : x
  2. Step 2: Convert to fraction form
    28,647.75/42,988.91 = 12,231.75/x
  3. Step 3: Cross multiply
    28,647.75x = 42,988.91 × 12,231.75
  4. Step 4: Simplify right side
    28,647.75x = 525,829,538.73
  5. Step 5: Solve for x
    x = 525,829,538.73/28,647.75
  6. Step 6: Final answer
    x = 18,355.00

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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.