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Finding the Fourth Proportional to 21,202.80, 31,802.04 and 5,620.56

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Solution

The fourth proportional to 21,202.80, 31,802.04 and 5,620.56 is: 8,430.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,202.80 : 31,802.04 = 5,620.56 : x
  2. Step 2: Convert to fraction form
    21,202.80/31,802.04 = 5,620.56/x
  3. Step 3: Cross multiply
    21,202.80x = 31,802.04 × 5,620.56
  4. Step 4: Simplify right side
    21,202.80x = 178,745,273.94
  5. Step 5: Solve for x
    x = 178,745,273.94/21,202.80
  6. Step 6: Final answer
    x = 8,430.27

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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.