Home / 7,815.27-10,785-4,278.45

Finding the Fourth Proportional to 7,815.27, 10,785 and 4,278.45

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Solution

The fourth proportional to 7,815.27, 10,785 and 4,278.45 is: 5,904.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.27 : 10,785 = 4,278.45 : x
  2. Step 2: Convert to fraction form
    7,815.27/10,785 = 4,278.45/x
  3. Step 3: Cross multiply
    7,815.27x = 10,785 × 4,278.45
  4. Step 4: Simplify right side
    7,815.27x = 46,143,083.25
  5. Step 5: Solve for x
    x = 46,143,083.25/7,815.27
  6. Step 6: Final answer
    x = 5,904.22

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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.