Home / 20,139.48-30,209.58-6,992.28

Finding the Fourth Proportional to 20,139.48, 30,209.58 and 6,992.28

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Solution

The fourth proportional to 20,139.48, 30,209.58 and 6,992.28 is: 10,488.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.48 : 30,209.58 = 6,992.28 : x
  2. Step 2: Convert to fraction form
    20,139.48/30,209.58 = 6,992.28/x
  3. Step 3: Cross multiply
    20,139.48x = 30,209.58 × 6,992.28
  4. Step 4: Simplify right side
    20,139.48x = 211,233,842.04
  5. Step 5: Solve for x
    x = 211,233,842.04/20,139.48
  6. Step 6: Final answer
    x = 10,488.54

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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.