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Finding the Fourth Proportional to 28,182.98, 38,893.74 and 15,607.73

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Solution

The fourth proportional to 28,182.98, 38,893.74 and 15,607.73 is: 21,539.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,182.98 : 38,893.74 = 15,607.73 : x
  2. Step 2: Convert to fraction form
    28,182.98/38,893.74 = 15,607.73/x
  3. Step 3: Cross multiply
    28,182.98x = 38,893.74 × 15,607.73
  4. Step 4: Simplify right side
    28,182.98x = 607,042,992.61
  5. Step 5: Solve for x
    x = 607,042,992.61/28,182.98
  6. Step 6: Final answer
    x = 21,539.35

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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.