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Finding the Fourth Proportional to 38,897.88, 53,675.88 and 21,896.68

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Solution

The fourth proportional to 38,897.88, 53,675.88 and 21,896.68 is: 30,215.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,897.88 : 53,675.88 = 21,896.68 : x
  2. Step 2: Convert to fraction form
    38,897.88/53,675.88 = 21,896.68/x
  3. Step 3: Cross multiply
    38,897.88x = 53,675.88 × 21,896.68
  4. Step 4: Simplify right side
    38,897.88x = 1,175,323,568.08
  5. Step 5: Solve for x
    x = 1,175,323,568.08/38,897.88
  6. Step 6: Final answer
    x = 30,215.62

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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.