Home / 13,708.98-18,918.38-7,421.36

Finding the Fourth Proportional to 13,708.98, 18,918.38 and 7,421.36

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Solution

The fourth proportional to 13,708.98, 18,918.38 and 7,421.36 is: 10,241.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.98 : 18,918.38 = 7,421.36 : x
  2. Step 2: Convert to fraction form
    13,708.98/18,918.38 = 7,421.36/x
  3. Step 3: Cross multiply
    13,708.98x = 18,918.38 × 7,421.36
  4. Step 4: Simplify right side
    13,708.98x = 140,400,032.56
  5. Step 5: Solve for x
    x = 140,400,032.56/13,708.98
  6. Step 6: Final answer
    x = 10,241.46

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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.