Home / 7,815.52-10,785.36-4,278.88

Finding the Fourth Proportional to 7,815.52, 10,785.36 and 4,278.88

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Solution

The fourth proportional to 7,815.52, 10,785.36 and 4,278.88 is: 5,904.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.52 : 10,785.36 = 4,278.88 : x
  2. Step 2: Convert to fraction form
    7,815.52/10,785.36 = 4,278.88/x
  3. Step 3: Cross multiply
    7,815.52x = 10,785.36 × 4,278.88
  4. Step 4: Simplify right side
    7,815.52x = 46,149,261.20
  5. Step 5: Solve for x
    x = 46,149,261.20/7,815.52
  6. Step 6: Final answer
    x = 5,904.82

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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.