Home / 20,869.70-31,301.30-6,829.62

Finding the Fourth Proportional to 20,869.70, 31,301.30 and 6,829.62

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Solution

The fourth proportional to 20,869.70, 31,301.30 and 6,829.62 is: 10,243.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.70 : 31,301.30 = 6,829.62 : x
  2. Step 2: Convert to fraction form
    20,869.70/31,301.30 = 6,829.62/x
  3. Step 3: Cross multiply
    20,869.70x = 31,301.30 × 6,829.62
  4. Step 4: Simplify right side
    20,869.70x = 213,775,984.51
  5. Step 5: Solve for x
    x = 213,775,984.51/20,869.70
  6. Step 6: Final answer
    x = 10,243.37

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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.