Home / 13,320.36-18,381.31-7,351.88

Finding the Fourth Proportional to 13,320.36, 18,381.31 and 7,351.88

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Solution

The fourth proportional to 13,320.36, 18,381.31 and 7,351.88 is: 10,145.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.36 : 18,381.31 = 7,351.88 : x
  2. Step 2: Convert to fraction form
    13,320.36/18,381.31 = 7,351.88/x
  3. Step 3: Cross multiply
    13,320.36x = 18,381.31 × 7,351.88
  4. Step 4: Simplify right side
    13,320.36x = 135,137,093.46
  5. Step 5: Solve for x
    x = 135,137,093.46/13,320.36
  6. Step 6: Final answer
    x = 10,145.15

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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.