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Finding the Fourth Proportional to 28,447.84, 39,262 and 20,516.32

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Solution

The fourth proportional to 28,447.84, 39,262 and 20,516.32 is: 28,315.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,447.84 : 39,262 = 20,516.32 : x
  2. Step 2: Convert to fraction form
    28,447.84/39,262 = 20,516.32/x
  3. Step 3: Cross multiply
    28,447.84x = 39,262 × 20,516.32
  4. Step 4: Simplify right side
    28,447.84x = 805,511,755.84
  5. Step 5: Solve for x
    x = 805,511,755.84/28,447.84
  6. Step 6: Final answer
    x = 28,315.39

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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.