Home / 19,120.86-28,686.35-6,640.85

Finding the Fourth Proportional to 19,120.86, 28,686.35 and 6,640.85

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Solution

The fourth proportional to 19,120.86, 28,686.35 and 6,640.85 is: 9,963.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,120.86 : 28,686.35 = 6,640.85 : x
  2. Step 2: Convert to fraction form
    19,120.86/28,686.35 = 6,640.85/x
  3. Step 3: Cross multiply
    19,120.86x = 28,686.35 × 6,640.85
  4. Step 4: Simplify right side
    19,120.86x = 190,501,835.72
  5. Step 5: Solve for x
    x = 190,501,835.72/19,120.86
  6. Step 6: Final answer
    x = 9,963.04

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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.