Home / 28,174.65-38,879.31-15,427.99

Finding the Fourth Proportional to 28,174.65, 38,879.31 and 15,427.99

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Solution

The fourth proportional to 28,174.65, 38,879.31 and 15,427.99 is: 21,289.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,174.65 : 38,879.31 = 15,427.99 : x
  2. Step 2: Convert to fraction form
    28,174.65/38,879.31 = 15,427.99/x
  3. Step 3: Cross multiply
    28,174.65x = 38,879.31 × 15,427.99
  4. Step 4: Simplify right side
    28,174.65x = 599,829,605.89
  5. Step 5: Solve for x
    x = 599,829,605.89/28,174.65
  6. Step 6: Final answer
    x = 21,289.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.