Home / 13,278.90-18,325.41-7,311.14

Finding the Fourth Proportional to 13,278.90, 18,325.41 and 7,311.14

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Solution

The fourth proportional to 13,278.90, 18,325.41 and 7,311.14 is: 10,089.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.90 : 18,325.41 = 7,311.14 : x
  2. Step 2: Convert to fraction form
    13,278.90/18,325.41 = 7,311.14/x
  3. Step 3: Cross multiply
    13,278.90x = 18,325.41 × 7,311.14
  4. Step 4: Simplify right side
    13,278.90x = 133,979,546.44
  5. Step 5: Solve for x
    x = 133,979,546.44/13,278.90
  6. Step 6: Final answer
    x = 10,089.66

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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.