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Finding the Fourth Proportional to 26,697.79, 40,049.72 and 7,978.89

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Solution

The fourth proportional to 26,697.79, 40,049.72 and 7,978.89 is: 11,969.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,697.79 : 40,049.72 = 7,978.89 : x
  2. Step 2: Convert to fraction form
    26,697.79/40,049.72 = 7,978.89/x
  3. Step 3: Cross multiply
    26,697.79x = 40,049.72 × 7,978.89
  4. Step 4: Simplify right side
    26,697.79x = 319,552,310.41
  5. Step 5: Solve for x
    x = 319,552,310.41/26,697.79
  6. Step 6: Final answer
    x = 11,969.24

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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.