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Finding the Fourth Proportional to 38,751.75, 53,477.42 and 21,984.75

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Solution

The fourth proportional to 38,751.75, 53,477.42 and 21,984.75 is: 30,338.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,751.75 : 53,477.42 = 21,984.75 : x
  2. Step 2: Convert to fraction form
    38,751.75/53,477.42 = 21,984.75/x
  3. Step 3: Cross multiply
    38,751.75x = 53,477.42 × 21,984.75
  4. Step 4: Simplify right side
    38,751.75x = 1,175,687,599.42
  5. Step 5: Solve for x
    x = 1,175,687,599.42/38,751.75
  6. Step 6: Final answer
    x = 30,338.96

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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.