Home / 20,857.51-31,289.68-6,813.46

Finding the Fourth Proportional to 20,857.51, 31,289.68 and 6,813.46

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Solution

The fourth proportional to 20,857.51, 31,289.68 and 6,813.46 is: 10,221.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.51 : 31,289.68 = 6,813.46 : x
  2. Step 2: Convert to fraction form
    20,857.51/31,289.68 = 6,813.46/x
  3. Step 3: Cross multiply
    20,857.51x = 31,289.68 × 6,813.46
  4. Step 4: Simplify right side
    20,857.51x = 213,191,005.17
  5. Step 5: Solve for x
    x = 213,191,005.17/20,857.51
  6. Step 6: Final answer
    x = 10,221.31

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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.