Home / 20,999.22-31,501.91-7,672.88

Finding the Fourth Proportional to 20,999.22, 31,501.91 and 7,672.88

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Solution

The fourth proportional to 20,999.22, 31,501.91 and 7,672.88 is: 11,510.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.22 : 31,501.91 = 7,672.88 : x
  2. Step 2: Convert to fraction form
    20,999.22/31,501.91 = 7,672.88/x
  3. Step 3: Cross multiply
    20,999.22x = 31,501.91 × 7,672.88
  4. Step 4: Simplify right side
    20,999.22x = 241,710,295.94
  5. Step 5: Solve for x
    x = 241,710,295.94/20,999.22
  6. Step 6: Final answer
    x = 11,510.44

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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.