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Finding the Fourth Proportional to 21,125.52, 31,682.52 and 7,086.06

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Solution

The fourth proportional to 21,125.52, 31,682.52 and 7,086.06 is: 10,627.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.52 : 31,682.52 = 7,086.06 : x
  2. Step 2: Convert to fraction form
    21,125.52/31,682.52 = 7,086.06/x
  3. Step 3: Cross multiply
    21,125.52x = 31,682.52 × 7,086.06
  4. Step 4: Simplify right side
    21,125.52x = 224,504,237.67
  5. Step 5: Solve for x
    x = 224,504,237.67/21,125.52
  6. Step 6: Final answer
    x = 10,627.16

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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.