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Finding the Fourth Proportional to 38,897.69, 53,674.37 and 21,901.50

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Solution

The fourth proportional to 38,897.69, 53,674.37 and 21,901.50 is: 30,221.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,897.69 : 53,674.37 = 21,901.50 : x
  2. Step 2: Convert to fraction form
    38,897.69/53,674.37 = 21,901.50/x
  3. Step 3: Cross multiply
    38,897.69x = 53,674.37 × 21,901.50
  4. Step 4: Simplify right side
    38,897.69x = 1,175,548,946.18
  5. Step 5: Solve for x
    x = 1,175,548,946.18/38,897.69
  6. Step 6: Final answer
    x = 30,221.56

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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.