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Finding the Fourth Proportional to 28,612.91, 42,938.41 and 11,759.74

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Solution

The fourth proportional to 28,612.91, 42,938.41 and 11,759.74 is: 17,647.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,612.91 : 42,938.41 = 11,759.74 : x
  2. Step 2: Convert to fraction form
    28,612.91/42,938.41 = 11,759.74/x
  3. Step 3: Cross multiply
    28,612.91x = 42,938.41 × 11,759.74
  4. Step 4: Simplify right side
    28,612.91x = 504,944,264.12
  5. Step 5: Solve for x
    x = 504,944,264.12/28,612.91
  6. Step 6: Final answer
    x = 17,647.43

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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.