Home / 20,980.14-31,405.01-15,683.96

Finding the Fourth Proportional to 20,980.14, 31,405.01 and 15,683.96

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Solution

The fourth proportional to 20,980.14, 31,405.01 and 15,683.96 is: 23,477.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.14 : 31,405.01 = 15,683.96 : x
  2. Step 2: Convert to fraction form
    20,980.14/31,405.01 = 15,683.96/x
  3. Step 3: Cross multiply
    20,980.14x = 31,405.01 × 15,683.96
  4. Step 4: Simplify right side
    20,980.14x = 492,554,685.19
  5. Step 5: Solve for x
    x = 492,554,685.19/20,980.14
  6. Step 6: Final answer
    x = 23,477.19

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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.