Home / 15,661.36-23,486.16-5,128.88

Finding the Fourth Proportional to 15,661.36, 23,486.16 and 5,128.88

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Solution

The fourth proportional to 15,661.36, 23,486.16 and 5,128.88 is: 7,691.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.36 : 23,486.16 = 5,128.88 : x
  2. Step 2: Convert to fraction form
    15,661.36/23,486.16 = 5,128.88/x
  3. Step 3: Cross multiply
    15,661.36x = 23,486.16 × 5,128.88
  4. Step 4: Simplify right side
    15,661.36x = 120,457,696.30
  5. Step 5: Solve for x
    x = 120,457,696.30/15,661.36
  6. Step 6: Final answer
    x = 7,691.39

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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.