Home / 7,811.87-10,779.09-4,454.75

Finding the Fourth Proportional to 7,811.87, 10,779.09 and 4,454.75

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Solution

The fourth proportional to 7,811.87, 10,779.09 and 4,454.75 is: 6,146.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.87 : 10,779.09 = 4,454.75 : x
  2. Step 2: Convert to fraction form
    7,811.87/10,779.09 = 4,454.75/x
  3. Step 3: Cross multiply
    7,811.87x = 10,779.09 × 4,454.75
  4. Step 4: Simplify right side
    7,811.87x = 48,018,097.28
  5. Step 5: Solve for x
    x = 48,018,097.28/7,811.87
  6. Step 6: Final answer
    x = 6,146.82

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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.