Home / 21,060.20-31,571.94-7,909.04

Finding the Fourth Proportional to 21,060.20, 31,571.94 and 7,909.04

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Solution

The fourth proportional to 21,060.20, 31,571.94 and 7,909.04 is: 11,856.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,060.20 : 31,571.94 = 7,909.04 : x
  2. Step 2: Convert to fraction form
    21,060.20/31,571.94 = 7,909.04/x
  3. Step 3: Cross multiply
    21,060.20x = 31,571.94 × 7,909.04
  4. Step 4: Simplify right side
    21,060.20x = 249,703,736.34
  5. Step 5: Solve for x
    x = 249,703,736.34/21,060.20
  6. Step 6: Final answer
    x = 11,856.67

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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.