Home / 7,815.31-10,785.15-4,278.85

Finding the Fourth Proportional to 7,815.31, 10,785.15 and 4,278.85

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Solution

The fourth proportional to 7,815.31, 10,785.15 and 4,278.85 is: 5,904.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.31 : 10,785.15 = 4,278.85 : x
  2. Step 2: Convert to fraction form
    7,815.31/10,785.15 = 4,278.85/x
  3. Step 3: Cross multiply
    7,815.31x = 10,785.15 × 4,278.85
  4. Step 4: Simplify right side
    7,815.31x = 46,147,985.15
  5. Step 5: Solve for x
    x = 46,147,985.15/7,815.31
  6. Step 6: Final answer
    x = 5,904.82

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.