Home / 15,681.33-21,640.82-9,311.22

Finding the Fourth Proportional to 15,681.33, 21,640.82 and 9,311.22

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Solution

The fourth proportional to 15,681.33, 21,640.82 and 9,311.22 is: 12,849.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,681.33 : 21,640.82 = 9,311.22 : x
  2. Step 2: Convert to fraction form
    15,681.33/21,640.82 = 9,311.22/x
  3. Step 3: Cross multiply
    15,681.33x = 21,640.82 × 9,311.22
  4. Step 4: Simplify right side
    15,681.33x = 201,502,389.44
  5. Step 5: Solve for x
    x = 201,502,389.44/15,681.33
  6. Step 6: Final answer
    x = 12,849.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.