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Finding the Fourth Proportional to 38,967.74, 53,778.78 and 21,975.26

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Solution

The fourth proportional to 38,967.74, 53,778.78 and 21,975.26 is: 30,327.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,967.74 : 53,778.78 = 21,975.26 : x
  2. Step 2: Convert to fraction form
    38,967.74/53,778.78 = 21,975.26/x
  3. Step 3: Cross multiply
    38,967.74x = 53,778.78 × 21,975.26
  4. Step 4: Simplify right side
    38,967.74x = 1,181,802,672.98
  5. Step 5: Solve for x
    x = 1,181,802,672.98/38,967.74
  6. Step 6: Final answer
    x = 30,327.72

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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.