Home / 28,318.88-42,442-11,690.58

Finding the Fourth Proportional to 28,318.88, 42,442 and 11,690.58

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Solution

The fourth proportional to 28,318.88, 42,442 and 11,690.58 is: 17,520.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.88 : 42,442 = 11,690.58 : x
  2. Step 2: Convert to fraction form
    28,318.88/42,442 = 11,690.58/x
  3. Step 3: Cross multiply
    28,318.88x = 42,442 × 11,690.58
  4. Step 4: Simplify right side
    28,318.88x = 496,171,596.36
  5. Step 5: Solve for x
    x = 496,171,596.36/28,318.88
  6. Step 6: Final answer
    x = 17,520.88

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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.