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Finding the Fourth Proportional to 28,193.81, 38,907.01 and 15,446.88

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Solution

The fourth proportional to 28,193.81, 38,907.01 and 15,446.88 is: 21,316.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,193.81 : 38,907.01 = 15,446.88 : x
  2. Step 2: Convert to fraction form
    28,193.81/38,907.01 = 15,446.88/x
  3. Step 3: Cross multiply
    28,193.81x = 38,907.01 × 15,446.88
  4. Step 4: Simplify right side
    28,193.81x = 600,991,933.94
  5. Step 5: Solve for x
    x = 600,991,933.94/28,193.81
  6. Step 6: Final answer
    x = 21,316.45

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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.