Home / 20,983.14-31,409.50-15,686.96

Finding the Fourth Proportional to 20,983.14, 31,409.50 and 15,686.96

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Solution

The fourth proportional to 20,983.14, 31,409.50 and 15,686.96 is: 23,481.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.14 : 31,409.50 = 15,686.96 : x
  2. Step 2: Convert to fraction form
    20,983.14/31,409.50 = 15,686.96/x
  3. Step 3: Cross multiply
    20,983.14x = 31,409.50 × 15,686.96
  4. Step 4: Simplify right side
    20,983.14x = 492,719,570.12
  5. Step 5: Solve for x
    x = 492,719,570.12/20,983.14
  6. Step 6: Final answer
    x = 23,481.69

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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.