Home / 28,135.65-42,205.71-9,415.79

Finding the Fourth Proportional to 28,135.65, 42,205.71 and 9,415.79

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Solution

The fourth proportional to 28,135.65, 42,205.71 and 9,415.79 is: 14,124.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.65 : 42,205.71 = 9,415.79 : x
  2. Step 2: Convert to fraction form
    28,135.65/42,205.71 = 9,415.79/x
  3. Step 3: Cross multiply
    28,135.65x = 42,205.71 × 9,415.79
  4. Step 4: Simplify right side
    28,135.65x = 397,399,891.13
  5. Step 5: Solve for x
    x = 397,399,891.13/28,135.65
  6. Step 6: Final answer
    x = 14,124.43

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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.