Home / 7,811.90-11,719.60-2,475.40

Finding the Fourth Proportional to 7,811.90, 11,719.60 and 2,475.40

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Solution

The fourth proportional to 7,811.90, 11,719.60 and 2,475.40 is: 3,713.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.90 : 11,719.60 = 2,475.40 : x
  2. Step 2: Convert to fraction form
    7,811.90/11,719.60 = 2,475.40/x
  3. Step 3: Cross multiply
    7,811.90x = 11,719.60 × 2,475.40
  4. Step 4: Simplify right side
    7,811.90x = 29,010,671.64
  5. Step 5: Solve for x
    x = 29,010,671.64/7,811.90
  6. Step 6: Final answer
    x = 3,713.65

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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.