Home / 20,639.04-28,481.84-11,207.60

Finding the Fourth Proportional to 20,639.04, 28,481.84 and 11,207.60

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Solution

The fourth proportional to 20,639.04, 28,481.84 and 11,207.60 is: 15,466.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.04 : 28,481.84 = 11,207.60 : x
  2. Step 2: Convert to fraction form
    20,639.04/28,481.84 = 11,207.60/x
  3. Step 3: Cross multiply
    20,639.04x = 28,481.84 × 11,207.60
  4. Step 4: Simplify right side
    20,639.04x = 319,213,069.98
  5. Step 5: Solve for x
    x = 319,213,069.98/20,639.04
  6. Step 6: Final answer
    x = 15,466.47

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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.