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Finding the Fourth Proportional to 18,977.88, 28,451.44 and 7,892.87

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Solution

The fourth proportional to 18,977.88, 28,451.44 and 7,892.87 is: 11,832.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,977.88 : 28,451.44 = 7,892.87 : x
  2. Step 2: Convert to fraction form
    18,977.88/28,451.44 = 7,892.87/x
  3. Step 3: Cross multiply
    18,977.88x = 28,451.44 × 7,892.87
  4. Step 4: Simplify right side
    18,977.88x = 224,563,384.84
  5. Step 5: Solve for x
    x = 224,563,384.84/18,977.88
  6. Step 6: Final answer
    x = 11,832.90

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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.