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Finding the Fourth Proportional to 53,738.69, 80,608.80 and 20,460.58

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Solution

The fourth proportional to 53,738.69, 80,608.80 and 20,460.58 is: 30,691.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,738.69 : 80,608.80 = 20,460.58 : x
  2. Step 2: Convert to fraction form
    53,738.69/80,608.80 = 20,460.58/x
  3. Step 3: Cross multiply
    53,738.69x = 80,608.80 × 20,460.58
  4. Step 4: Simplify right side
    53,738.69x = 1,649,302,599.58
  5. Step 5: Solve for x
    x = 1,649,302,599.58/53,738.69
  6. Step 6: Final answer
    x = 30,691.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.