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Finding the Fourth Proportional to 28,524.87, 42,805.94 and 12,942.63

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Solution

The fourth proportional to 28,524.87, 42,805.94 and 12,942.63 is: 19,422.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,524.87 : 42,805.94 = 12,942.63 : x
  2. Step 2: Convert to fraction form
    28,524.87/42,805.94 = 12,942.63/x
  3. Step 3: Cross multiply
    28,524.87x = 42,805.94 × 12,942.63
  4. Step 4: Simplify right side
    28,524.87x = 554,021,378.51
  5. Step 5: Solve for x
    x = 554,021,378.51/28,524.87
  6. Step 6: Final answer
    x = 19,422.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.