Home / 21,074.17-31,619.76-9,379.39

Finding the Fourth Proportional to 21,074.17, 31,619.76 and 9,379.39

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Solution

The fourth proportional to 21,074.17, 31,619.76 and 9,379.39 is: 14,072.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,074.17 : 31,619.76 = 9,379.39 : x
  2. Step 2: Convert to fraction form
    21,074.17/31,619.76 = 9,379.39/x
  3. Step 3: Cross multiply
    21,074.17x = 31,619.76 × 9,379.39
  4. Step 4: Simplify right side
    21,074.17x = 296,574,060.75
  5. Step 5: Solve for x
    x = 296,574,060.75/21,074.17
  6. Step 6: Final answer
    x = 14,072.87

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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.