Home / 7,815.11-10,784.87-4,278.54

Finding the Fourth Proportional to 7,815.11, 10,784.87 and 4,278.54

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Solution

The fourth proportional to 7,815.11, 10,784.87 and 4,278.54 is: 5,904.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.11 : 10,784.87 = 4,278.54 : x
  2. Step 2: Convert to fraction form
    7,815.11/10,784.87 = 4,278.54/x
  3. Step 3: Cross multiply
    7,815.11x = 10,784.87 × 4,278.54
  4. Step 4: Simplify right side
    7,815.11x = 46,143,532.78
  5. Step 5: Solve for x
    x = 46,143,532.78/7,815.11
  6. Step 6: Final answer
    x = 5,904.40

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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.