Home / 20,970.14-31,379.82-15,409.68

Finding the Fourth Proportional to 20,970.14, 31,379.82 and 15,409.68

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Solution

The fourth proportional to 20,970.14, 31,379.82 and 15,409.68 is: 23,059.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.14 : 31,379.82 = 15,409.68 : x
  2. Step 2: Convert to fraction form
    20,970.14/31,379.82 = 15,409.68/x
  3. Step 3: Cross multiply
    20,970.14x = 31,379.82 × 15,409.68
  4. Step 4: Simplify right side
    20,970.14x = 483,552,984.66
  5. Step 5: Solve for x
    x = 483,552,984.66/20,970.14
  6. Step 6: Final answer
    x = 23,059.12

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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.