Home / 20,639.06-28,481.65-11,207.69

Finding the Fourth Proportional to 20,639.06, 28,481.65 and 11,207.69

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Solution

The fourth proportional to 20,639.06, 28,481.65 and 11,207.69 is: 15,466.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.06 : 28,481.65 = 11,207.69 : x
  2. Step 2: Convert to fraction form
    20,639.06/28,481.65 = 11,207.69/x
  3. Step 3: Cross multiply
    20,639.06x = 28,481.65 × 11,207.69
  4. Step 4: Simplify right side
    20,639.06x = 319,213,333.46
  5. Step 5: Solve for x
    x = 319,213,333.46/20,639.06
  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.