Home / 21,087.92-31,609.84-9,981.38

Finding the Fourth Proportional to 21,087.92, 31,609.84 and 9,981.38

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Solution

The fourth proportional to 21,087.92, 31,609.84 and 9,981.38 is: 14,961.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.92 : 31,609.84 = 9,981.38 : x
  2. Step 2: Convert to fraction form
    21,087.92/31,609.84 = 9,981.38/x
  3. Step 3: Cross multiply
    21,087.92x = 31,609.84 × 9,981.38
  4. Step 4: Simplify right side
    21,087.92x = 315,509,824.78
  5. Step 5: Solve for x
    x = 315,509,824.78/21,087.92
  6. Step 6: Final answer
    x = 14,961.64

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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.