Home / 20,625.67-28,456.90-12,125.08

Finding the Fourth Proportional to 20,625.67, 28,456.90 and 12,125.08

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Solution

The fourth proportional to 20,625.67, 28,456.90 and 12,125.08 is: 16,728.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,625.67 : 28,456.90 = 12,125.08 : x
  2. Step 2: Convert to fraction form
    20,625.67/28,456.90 = 12,125.08/x
  3. Step 3: Cross multiply
    20,625.67x = 28,456.90 × 12,125.08
  4. Step 4: Simplify right side
    20,625.67x = 345,042,189.05
  5. Step 5: Solve for x
    x = 345,042,189.05/20,625.67
  6. Step 6: Final answer
    x = 16,728.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.