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Finding the Fourth Proportional to 28,531.54, 42,780.84 and 8,804.80

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Solution

The fourth proportional to 28,531.54, 42,780.84 and 8,804.80 is: 13,202.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,531.54 : 42,780.84 = 8,804.80 : x
  2. Step 2: Convert to fraction form
    28,531.54/42,780.84 = 8,804.80/x
  3. Step 3: Cross multiply
    28,531.54x = 42,780.84 × 8,804.80
  4. Step 4: Simplify right side
    28,531.54x = 376,676,740.03
  5. Step 5: Solve for x
    x = 376,676,740.03/28,531.54
  6. Step 6: Final answer
    x = 13,202.12

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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.