Home / 7,278.40-10,914-3,380.32

Finding the Fourth Proportional to 7,278.40, 10,914 and 3,380.32

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Solution

The fourth proportional to 7,278.40, 10,914 and 3,380.32 is: 5,068.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,278.40 : 10,914 = 3,380.32 : x
  2. Step 2: Convert to fraction form
    7,278.40/10,914 = 3,380.32/x
  3. Step 3: Cross multiply
    7,278.40x = 10,914 × 3,380.32
  4. Step 4: Simplify right side
    7,278.40x = 36,892,812.48
  5. Step 5: Solve for x
    x = 36,892,812.48/7,278.40
  6. Step 6: Final answer
    x = 5,068.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.