Home / 13,708.14-18,917.30-7,420.52

Finding the Fourth Proportional to 13,708.14, 18,917.30 and 7,420.52

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Solution

The fourth proportional to 13,708.14, 18,917.30 and 7,420.52 is: 10,240.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.14 : 18,917.30 = 7,420.52 : x
  2. Step 2: Convert to fraction form
    13,708.14/18,917.30 = 7,420.52/x
  3. Step 3: Cross multiply
    13,708.14x = 18,917.30 × 7,420.52
  4. Step 4: Simplify right side
    13,708.14x = 140,376,173.90
  5. Step 5: Solve for x
    x = 140,376,173.90/13,708.14
  6. Step 6: Final answer
    x = 10,240.35

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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.