Home / 20,675.75-28,532.72-12,290.63

Finding the Fourth Proportional to 20,675.75, 28,532.72 and 12,290.63

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Solution

The fourth proportional to 20,675.75, 28,532.72 and 12,290.63 is: 16,961.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.75 : 28,532.72 = 12,290.63 : x
  2. Step 2: Convert to fraction form
    20,675.75/28,532.72 = 12,290.63/x
  3. Step 3: Cross multiply
    20,675.75x = 28,532.72 × 12,290.63
  4. Step 4: Simplify right side
    20,675.75x = 350,684,992.48
  5. Step 5: Solve for x
    x = 350,684,992.48/20,675.75
  6. Step 6: Final answer
    x = 16,961.18

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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.