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Finding the Fourth Proportional to 38,907.36, 53,697.24 and 21,914.88

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Solution

The fourth proportional to 38,907.36, 53,697.24 and 21,914.88 is: 30,245.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,907.36 : 53,697.24 = 21,914.88 : x
  2. Step 2: Convert to fraction form
    38,907.36/53,697.24 = 21,914.88/x
  3. Step 3: Cross multiply
    38,907.36x = 53,697.24 × 21,914.88
  4. Step 4: Simplify right side
    38,907.36x = 1,176,768,570.93
  5. Step 5: Solve for x
    x = 1,176,768,570.93/38,907.36
  6. Step 6: Final answer
    x = 30,245.40

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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.