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Finding the Fourth Proportional to 28,063.78, 42,086.59 and 9,338.78

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Solution

The fourth proportional to 28,063.78, 42,086.59 and 9,338.78 is: 14,005.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,063.78 : 42,086.59 = 9,338.78 : x
  2. Step 2: Convert to fraction form
    28,063.78/42,086.59 = 9,338.78/x
  3. Step 3: Cross multiply
    28,063.78x = 42,086.59 × 9,338.78
  4. Step 4: Simplify right side
    28,063.78x = 393,037,486.83
  5. Step 5: Solve for x
    x = 393,037,486.83/28,063.78
  6. Step 6: Final answer
    x = 14,005.15

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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.