Home / 13,131.36-18,115.56-8,649.36

Finding the Fourth Proportional to 13,131.36, 18,115.56 and 8,649.36

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Solution

The fourth proportional to 13,131.36, 18,115.56 and 8,649.36 is: 11,932.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.36 : 18,115.56 = 8,649.36 : x
  2. Step 2: Convert to fraction form
    13,131.36/18,115.56 = 8,649.36/x
  3. Step 3: Cross multiply
    13,131.36x = 18,115.56 × 8,649.36
  4. Step 4: Simplify right side
    13,131.36x = 156,688,000.04
  5. Step 5: Solve for x
    x = 156,688,000.04/13,131.36
  6. Step 6: Final answer
    x = 11,932.35

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Double scale
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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.