Home / 28,631.89-42,964.58-11,990.52

Finding the Fourth Proportional to 28,631.89, 42,964.58 and 11,990.52

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Solution

The fourth proportional to 28,631.89, 42,964.58 and 11,990.52 is: 17,992.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,631.89 : 42,964.58 = 11,990.52 : x
  2. Step 2: Convert to fraction form
    28,631.89/42,964.58 = 11,990.52/x
  3. Step 3: Cross multiply
    28,631.89x = 42,964.58 × 11,990.52
  4. Step 4: Simplify right side
    28,631.89x = 515,167,595.83
  5. Step 5: Solve for x
    x = 515,167,595.83/28,631.89
  6. Step 6: Final answer
    x = 17,992.79

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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.