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Finding the Fourth Proportional to 21,203.45, 31,819.75 and 7,352.45

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Solution

The fourth proportional to 21,203.45, 31,819.75 and 7,352.45 is: 11,033.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.45 : 31,819.75 = 7,352.45 : x
  2. Step 2: Convert to fraction form
    21,203.45/31,819.75 = 7,352.45/x
  3. Step 3: Cross multiply
    21,203.45x = 31,819.75 × 7,352.45
  4. Step 4: Simplify right side
    21,203.45x = 233,953,120.89
  5. Step 5: Solve for x
    x = 233,953,120.89/21,203.45
  6. Step 6: Final answer
    x = 11,033.73

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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.