Home / 13,129.26-18,120.54-7,827.20

Finding the Fourth Proportional to 13,129.26, 18,120.54 and 7,827.20

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Solution

The fourth proportional to 13,129.26, 18,120.54 and 7,827.20 is: 10,802.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.26 : 18,120.54 = 7,827.20 : x
  2. Step 2: Convert to fraction form
    13,129.26/18,120.54 = 7,827.20/x
  3. Step 3: Cross multiply
    13,129.26x = 18,120.54 × 7,827.20
  4. Step 4: Simplify right side
    13,129.26x = 141,833,090.69
  5. Step 5: Solve for x
    x = 141,833,090.69/13,129.26
  6. Step 6: Final answer
    x = 10,802.82

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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.