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Finding the Fourth Proportional to 21,025.88, 31,539.63 and 7,174.88

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Solution

The fourth proportional to 21,025.88, 31,539.63 and 7,174.88 is: 10,762.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,025.88 : 31,539.63 = 7,174.88 : x
  2. Step 2: Convert to fraction form
    21,025.88/31,539.63 = 7,174.88/x
  3. Step 3: Cross multiply
    21,025.88x = 31,539.63 × 7,174.88
  4. Step 4: Simplify right side
    21,025.88x = 226,292,902.80
  5. Step 5: Solve for x
    x = 226,292,902.80/21,025.88
  6. Step 6: Final answer
    x = 10,762.59

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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.