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Finding the Fourth Proportional to 38,729.88, 53,447.23 and 21,962.88

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Solution

The fourth proportional to 38,729.88, 53,447.23 and 21,962.88 is: 30,308.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,729.88 : 53,447.23 = 21,962.88 : x
  2. Step 2: Convert to fraction form
    38,729.88/53,447.23 = 21,962.88/x
  3. Step 3: Cross multiply
    38,729.88x = 53,447.23 × 21,962.88
  4. Step 4: Simplify right side
    38,729.88x = 1,173,855,098.82
  5. Step 5: Solve for x
    x = 1,173,855,098.82/38,729.88
  6. Step 6: Final answer
    x = 30,308.77

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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.