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Finding the Fourth Proportional to 28,008.85, 42,019.85 and 11,142.82

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Solution

The fourth proportional to 28,008.85, 42,019.85 and 11,142.82 is: 16,716.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,008.85 : 42,019.85 = 11,142.82 : x
  2. Step 2: Convert to fraction form
    28,008.85/42,019.85 = 11,142.82/x
  3. Step 3: Cross multiply
    28,008.85x = 42,019.85 × 11,142.82
  4. Step 4: Simplify right side
    28,008.85x = 468,219,464.21
  5. Step 5: Solve for x
    x = 468,219,464.21/28,008.85
  6. Step 6: Final answer
    x = 16,716.84

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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.