Home / 20,758.20-31,136.41-9,661.06

Finding the Fourth Proportional to 20,758.20, 31,136.41 and 9,661.06

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Solution

The fourth proportional to 20,758.20, 31,136.41 and 9,661.06 is: 14,491.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.20 : 31,136.41 = 9,661.06 : x
  2. Step 2: Convert to fraction form
    20,758.20/31,136.41 = 9,661.06/x
  3. Step 3: Cross multiply
    20,758.20x = 31,136.41 × 9,661.06
  4. Step 4: Simplify right side
    20,758.20x = 300,810,725.19
  5. Step 5: Solve for x
    x = 300,810,725.19/20,758.20
  6. Step 6: Final answer
    x = 14,491.18

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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.