Home / 12,485.30-18,721.49-4,585.79

Finding the Fourth Proportional to 12,485.30, 18,721.49 and 4,585.79

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Solution

The fourth proportional to 12,485.30, 18,721.49 and 4,585.79 is: 6,876.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.30 : 18,721.49 = 4,585.79 : x
  2. Step 2: Convert to fraction form
    12,485.30/18,721.49 = 4,585.79/x
  3. Step 3: Cross multiply
    12,485.30x = 18,721.49 × 4,585.79
  4. Step 4: Simplify right side
    12,485.30x = 85,852,879.90
  5. Step 5: Solve for x
    x = 85,852,879.90/12,485.30
  6. Step 6: Final answer
    x = 6,876.32

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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.