Home / 28,986.40-43,476.12-7,928

Finding the Fourth Proportional to 28,986.40, 43,476.12 and 7,928

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Solution

The fourth proportional to 28,986.40, 43,476.12 and 7,928 is: 11,891.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,986.40 : 43,476.12 = 7,928 : x
  2. Step 2: Convert to fraction form
    28,986.40/43,476.12 = 7,928/x
  3. Step 3: Cross multiply
    28,986.40x = 43,476.12 × 7,928
  4. Step 4: Simplify right side
    28,986.40x = 344,678,679.36
  5. Step 5: Solve for x
    x = 344,678,679.36/28,986.40
  6. Step 6: Final answer
    x = 11,891.05

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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.