Home / 7,815.77-10,785.51-4,278.77

Finding the Fourth Proportional to 7,815.77, 10,785.51 and 4,278.77

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Solution

The fourth proportional to 7,815.77, 10,785.51 and 4,278.77 is: 5,904.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.77 : 10,785.51 = 4,278.77 : x
  2. Step 2: Convert to fraction form
    7,815.77/10,785.51 = 4,278.77/x
  3. Step 3: Cross multiply
    7,815.77x = 10,785.51 × 4,278.77
  4. Step 4: Simplify right side
    7,815.77x = 46,148,662.70
  5. Step 5: Solve for x
    x = 46,148,662.70/7,815.77
  6. Step 6: Final answer
    x = 5,904.56

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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.