Home / 15,816.21-21,825.70-8,645.96

Finding the Fourth Proportional to 15,816.21, 21,825.70 and 8,645.96

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Solution

The fourth proportional to 15,816.21, 21,825.70 and 8,645.96 is: 11,931.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,816.21 : 21,825.70 = 8,645.96 : x
  2. Step 2: Convert to fraction form
    15,816.21/21,825.70 = 8,645.96/x
  3. Step 3: Cross multiply
    15,816.21x = 21,825.70 × 8,645.96
  4. Step 4: Simplify right side
    15,816.21x = 188,704,087.99
  5. Step 5: Solve for x
    x = 188,704,087.99/15,816.21
  6. Step 6: Final answer
    x = 11,931.05

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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.