Home / 7,815.36-10,785.21-4,278.59

Finding the Fourth Proportional to 7,815.36, 10,785.21 and 4,278.59

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Solution

The fourth proportional to 7,815.36, 10,785.21 and 4,278.59 is: 5,904.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.36 : 10,785.21 = 4,278.59 : x
  2. Step 2: Convert to fraction form
    7,815.36/10,785.21 = 4,278.59/x
  3. Step 3: Cross multiply
    7,815.36x = 10,785.21 × 4,278.59
  4. Step 4: Simplify right side
    7,815.36x = 46,145,416.33
  5. Step 5: Solve for x
    x = 46,145,416.33/7,815.36
  6. Step 6: Final answer
    x = 5,904.45

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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.