Home / 20,678.07-31,020.60-6,637.83

Finding the Fourth Proportional to 20,678.07, 31,020.60 and 6,637.83

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Solution

The fourth proportional to 20,678.07, 31,020.60 and 6,637.83 is: 9,957.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.07 : 31,020.60 = 6,637.83 : x
  2. Step 2: Convert to fraction form
    20,678.07/31,020.60 = 6,637.83/x
  3. Step 3: Cross multiply
    20,678.07x = 31,020.60 × 6,637.83
  4. Step 4: Simplify right side
    20,678.07x = 205,909,469.30
  5. Step 5: Solve for x
    x = 205,909,469.30/20,678.07
  6. Step 6: Final answer
    x = 9,957.87

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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.