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Finding the Fourth Proportional to 21,391.70, 32,087.98 and 7,351.58

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Solution

The fourth proportional to 21,391.70, 32,087.98 and 7,351.58 is: 11,027.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.70 : 32,087.98 = 7,351.58 : x
  2. Step 2: Convert to fraction form
    21,391.70/32,087.98 = 7,351.58/x
  3. Step 3: Cross multiply
    21,391.70x = 32,087.98 × 7,351.58
  4. Step 4: Simplify right side
    21,391.70x = 235,897,352.01
  5. Step 5: Solve for x
    x = 235,897,352.01/21,391.70
  6. Step 6: Final answer
    x = 11,027.52

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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.