Home / 7,815.91-10,785.96-4,279.12

Finding the Fourth Proportional to 7,815.91, 10,785.96 and 4,279.12

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Solution

The fourth proportional to 7,815.91, 10,785.96 and 4,279.12 is: 5,905.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.91 : 10,785.96 = 4,279.12 : x
  2. Step 2: Convert to fraction form
    7,815.91/10,785.96 = 4,279.12/x
  3. Step 3: Cross multiply
    7,815.91x = 10,785.96 × 4,279.12
  4. Step 4: Simplify right side
    7,815.91x = 46,154,417.16
  5. Step 5: Solve for x
    x = 46,154,417.16/7,815.91
  6. Step 6: Final answer
    x = 5,905.19

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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.