Home / 28,399.80-42,605.64-9,678.36

Finding the Fourth Proportional to 28,399.80, 42,605.64 and 9,678.36

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Solution

The fourth proportional to 28,399.80, 42,605.64 and 9,678.36 is: 14,519.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,399.80 : 42,605.64 = 9,678.36 : x
  2. Step 2: Convert to fraction form
    28,399.80/42,605.64 = 9,678.36/x
  3. Step 3: Cross multiply
    28,399.80x = 42,605.64 × 9,678.36
  4. Step 4: Simplify right side
    28,399.80x = 412,352,721.95
  5. Step 5: Solve for x
    x = 412,352,721.95/28,399.80
  6. Step 6: Final answer
    x = 14,519.56

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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.