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Finding the Fourth Proportional to 28,249.97, 38,984.96 and 15,674.72

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Solution

The fourth proportional to 28,249.97, 38,984.96 and 15,674.72 is: 21,631.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,249.97 : 38,984.96 = 15,674.72 : x
  2. Step 2: Convert to fraction form
    28,249.97/38,984.96 = 15,674.72/x
  3. Step 3: Cross multiply
    28,249.97x = 38,984.96 × 15,674.72
  4. Step 4: Simplify right side
    28,249.97x = 611,078,263.89
  5. Step 5: Solve for x
    x = 611,078,263.89/28,249.97
  6. Step 6: Final answer
    x = 21,631.11

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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.