Home / 15,380.28-21,225.04-8,665.38

Finding the Fourth Proportional to 15,380.28, 21,225.04 and 8,665.38

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Solution

The fourth proportional to 15,380.28, 21,225.04 and 8,665.38 is: 11,958.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,380.28 : 21,225.04 = 8,665.38 : x
  2. Step 2: Convert to fraction form
    15,380.28/21,225.04 = 8,665.38/x
  3. Step 3: Cross multiply
    15,380.28x = 21,225.04 × 8,665.38
  4. Step 4: Simplify right side
    15,380.28x = 183,923,015.45
  5. Step 5: Solve for x
    x = 183,923,015.45/15,380.28
  6. Step 6: Final answer
    x = 11,958.37

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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.