Home / 7,815.24-10,785.02-4,278.42

Finding the Fourth Proportional to 7,815.24, 10,785.02 and 4,278.42

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Solution

The fourth proportional to 7,815.24, 10,785.02 and 4,278.42 is: 5,904.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.24 : 10,785.02 = 4,278.42 : x
  2. Step 2: Convert to fraction form
    7,815.24/10,785.02 = 4,278.42/x
  3. Step 3: Cross multiply
    7,815.24x = 10,785.02 × 4,278.42
  4. Step 4: Simplify right side
    7,815.24x = 46,142,823.88
  5. Step 5: Solve for x
    x = 46,142,823.88/7,815.24
  6. Step 6: Final answer
    x = 5,904.21

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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.