Home / 20,791.93-31,168.45-7,640.77

Finding the Fourth Proportional to 20,791.93, 31,168.45 and 7,640.77

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Solution

The fourth proportional to 20,791.93, 31,168.45 and 7,640.77 is: 11,454.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.93 : 31,168.45 = 7,640.77 : x
  2. Step 2: Convert to fraction form
    20,791.93/31,168.45 = 7,640.77/x
  3. Step 3: Cross multiply
    20,791.93x = 31,168.45 × 7,640.77
  4. Step 4: Simplify right side
    20,791.93x = 238,150,957.71
  5. Step 5: Solve for x
    x = 238,150,957.71/20,791.93
  6. Step 6: Final answer
    x = 11,454.01

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1.5x scale

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.