Home / 20,628.67-28,461.04-12,128.08

Finding the Fourth Proportional to 20,628.67, 28,461.04 and 12,128.08

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Solution

The fourth proportional to 20,628.67, 28,461.04 and 12,128.08 is: 16,732.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628.67 : 28,461.04 = 12,128.08 : x
  2. Step 2: Convert to fraction form
    20,628.67/28,461.04 = 12,128.08/x
  3. Step 3: Cross multiply
    20,628.67x = 28,461.04 × 12,128.08
  4. Step 4: Simplify right side
    20,628.67x = 345,177,770.00
  5. Step 5: Solve for x
    x = 345,177,770.00/20,628.67
  6. Step 6: Final answer
    x = 16,732.91

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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.