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Finding the Fourth Proportional to 27,999.58, 42,007.57 and 8,278.65

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Solution

The fourth proportional to 27,999.58, 42,007.57 and 8,278.65 is: 12,420.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,999.58 : 42,007.57 = 8,278.65 : x
  2. Step 2: Convert to fraction form
    27,999.58/42,007.57 = 8,278.65/x
  3. Step 3: Cross multiply
    27,999.58x = 42,007.57 × 8,278.65
  4. Step 4: Simplify right side
    27,999.58x = 347,765,951.16
  5. Step 5: Solve for x
    x = 347,765,951.16/27,999.58
  6. Step 6: Final answer
    x = 12,420.40

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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.