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Finding the Fourth Proportional to 21,604.31, 32,400.15 and 7,561.73

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Solution

The fourth proportional to 21,604.31, 32,400.15 and 7,561.73 is: 11,340.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,604.31 : 32,400.15 = 7,561.73 : x
  2. Step 2: Convert to fraction form
    21,604.31/32,400.15 = 7,561.73/x
  3. Step 3: Cross multiply
    21,604.31x = 32,400.15 × 7,561.73
  4. Step 4: Simplify right side
    21,604.31x = 245,001,186.26
  5. Step 5: Solve for x
    x = 245,001,186.26/21,604.31
  6. Step 6: Final answer
    x = 11,340.38

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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.