Home / 20,790.43-31,185.65-5,208.06

Finding the Fourth Proportional to 20,790.43, 31,185.65 and 5,208.06

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Solution

The fourth proportional to 20,790.43, 31,185.65 and 5,208.06 is: 7,812.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.43 : 31,185.65 = 5,208.06 : x
  2. Step 2: Convert to fraction form
    20,790.43/31,185.65 = 5,208.06/x
  3. Step 3: Cross multiply
    20,790.43x = 31,185.65 × 5,208.06
  4. Step 4: Simplify right side
    20,790.43x = 162,416,736.34
  5. Step 5: Solve for x
    x = 162,416,736.34/20,790.43
  6. Step 6: Final answer
    x = 7,812.09

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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.