Home / 7,815.85-10,785.83-4,278.98

Finding the Fourth Proportional to 7,815.85, 10,785.83 and 4,278.98

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Solution

The fourth proportional to 7,815.85, 10,785.83 and 4,278.98 is: 5,904.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.85 : 10,785.83 = 4,278.98 : x
  2. Step 2: Convert to fraction form
    7,815.85/10,785.83 = 4,278.98/x
  3. Step 3: Cross multiply
    7,815.85x = 10,785.83 × 4,278.98
  4. Step 4: Simplify right side
    7,815.85x = 46,152,356.42
  5. Step 5: Solve for x
    x = 46,152,356.42/7,815.85
  6. Step 6: Final answer
    x = 5,904.97

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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.