Home / 20,986.40-31,450.80-17,098.40

Finding the Fourth Proportional to 20,986.40, 31,450.80 and 17,098.40

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Solution

The fourth proportional to 20,986.40, 31,450.80 and 17,098.40 is: 25,624.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.40 : 31,450.80 = 17,098.40 : x
  2. Step 2: Convert to fraction form
    20,986.40/31,450.80 = 17,098.40/x
  3. Step 3: Cross multiply
    20,986.40x = 31,450.80 × 17,098.40
  4. Step 4: Simplify right side
    20,986.40x = 537,758,358.72
  5. Step 5: Solve for x
    x = 537,758,358.72/20,986.40
  6. Step 6: Final answer
    x = 25,624.14

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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.