Home / 20,639.52-28,482.55-11,687.03

Finding the Fourth Proportional to 20,639.52, 28,482.55 and 11,687.03

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Solution

The fourth proportional to 20,639.52, 28,482.55 and 11,687.03 is: 16,128.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.52 : 28,482.55 = 11,687.03 : x
  2. Step 2: Convert to fraction form
    20,639.52/28,482.55 = 11,687.03/x
  3. Step 3: Cross multiply
    20,639.52x = 28,482.55 × 11,687.03
  4. Step 4: Simplify right side
    20,639.52x = 332,876,416.33
  5. Step 5: Solve for x
    x = 332,876,416.33/20,639.52
  6. Step 6: Final answer
    x = 16,128.11

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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.