Home / 13,708.67-18,917.88-7,421

Finding the Fourth Proportional to 13,708.67, 18,917.88 and 7,421

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Solution

The fourth proportional to 13,708.67, 18,917.88 and 7,421 is: 10,240.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.67 : 18,917.88 = 7,421 : x
  2. Step 2: Convert to fraction form
    13,708.67/18,917.88 = 7,421/x
  3. Step 3: Cross multiply
    13,708.67x = 18,917.88 × 7,421
  4. Step 4: Simplify right side
    13,708.67x = 140,389,587.48
  5. Step 5: Solve for x
    x = 140,389,587.48/13,708.67
  6. Step 6: Final answer
    x = 10,240.93

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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.