Home / 7,815.71-10,785.68-4,279.14

Finding the Fourth Proportional to 7,815.71, 10,785.68 and 4,279.14

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Solution

The fourth proportional to 7,815.71, 10,785.68 and 4,279.14 is: 5,905.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.71 : 10,785.68 = 4,279.14 : x
  2. Step 2: Convert to fraction form
    7,815.71/10,785.68 = 4,279.14/x
  3. Step 3: Cross multiply
    7,815.71x = 10,785.68 × 4,279.14
  4. Step 4: Simplify right side
    7,815.71x = 46,153,434.72
  5. Step 5: Solve for x
    x = 46,153,434.72/7,815.71
  6. Step 6: Final answer
    x = 5,905.21

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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.