Home / 7,815.29-10,785.09-4,278.57

Finding the Fourth Proportional to 7,815.29, 10,785.09 and 4,278.57

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Solution

The fourth proportional to 7,815.29, 10,785.09 and 4,278.57 is: 5,904.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.29 : 10,785.09 = 4,278.57 : x
  2. Step 2: Convert to fraction form
    7,815.29/10,785.09 = 4,278.57/x
  3. Step 3: Cross multiply
    7,815.29x = 10,785.09 × 4,278.57
  4. Step 4: Simplify right side
    7,815.29x = 46,144,762.52
  5. Step 5: Solve for x
    x = 46,144,762.52/7,815.29
  6. Step 6: Final answer
    x = 5,904.42

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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.