Home / 21,315.38-31,975.80-11,441.12

Finding the Fourth Proportional to 21,315.38, 31,975.80 and 11,441.12

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Solution

The fourth proportional to 21,315.38, 31,975.80 and 11,441.12 is: 17,163.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.38 : 31,975.80 = 11,441.12 : x
  2. Step 2: Convert to fraction form
    21,315.38/31,975.80 = 11,441.12/x
  3. Step 3: Cross multiply
    21,315.38x = 31,975.80 × 11,441.12
  4. Step 4: Simplify right side
    21,315.38x = 365,838,964.90
  5. Step 5: Solve for x
    x = 365,838,964.90/21,315.38
  6. Step 6: Final answer
    x = 17,163.15

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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.