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Finding the Fourth Proportional to 21,955.09, 32,932.72 and 5,315.09

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Solution

The fourth proportional to 21,955.09, 32,932.72 and 5,315.09 is: 7,972.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.09 : 32,932.72 = 5,315.09 : x
  2. Step 2: Convert to fraction form
    21,955.09/32,932.72 = 5,315.09/x
  3. Step 3: Cross multiply
    21,955.09x = 32,932.72 × 5,315.09
  4. Step 4: Simplify right side
    21,955.09x = 175,040,344.17
  5. Step 5: Solve for x
    x = 175,040,344.17/21,955.09
  6. Step 6: Final answer
    x = 7,972.66

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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.