Home / 13,128.24-18,118.72-8,348.65

Finding the Fourth Proportional to 13,128.24, 18,118.72 and 8,348.65

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Solution

The fourth proportional to 13,128.24, 18,118.72 and 8,348.65 is: 11,522.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.24 : 18,118.72 = 8,348.65 : x
  2. Step 2: Convert to fraction form
    13,128.24/18,118.72 = 8,348.65/x
  3. Step 3: Cross multiply
    13,128.24x = 18,118.72 × 8,348.65
  4. Step 4: Simplify right side
    13,128.24x = 151,266,761.13
  5. Step 5: Solve for x
    x = 151,266,761.13/13,128.24
  6. Step 6: Final answer
    x = 11,522.24

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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.