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Finding the Fourth Proportional to 21,686.25, 29,927.07 and 11,750.25

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Solution

The fourth proportional to 21,686.25, 29,927.07 and 11,750.25 is: 16,215.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,686.25 : 29,927.07 = 11,750.25 : x
  2. Step 2: Convert to fraction form
    21,686.25/29,927.07 = 11,750.25/x
  3. Step 3: Cross multiply
    21,686.25x = 29,927.07 × 11,750.25
  4. Step 4: Simplify right side
    21,686.25x = 351,650,554.27
  5. Step 5: Solve for x
    x = 351,650,554.27/21,686.25
  6. Step 6: Final answer
    x = 16,215.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.