Home / 7,815.88-10,785.95-4,279.06

Finding the Fourth Proportional to 7,815.88, 10,785.95 and 4,279.06

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Solution

The fourth proportional to 7,815.88, 10,785.95 and 4,279.06 is: 5,905.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.88 : 10,785.95 = 4,279.06 : x
  2. Step 2: Convert to fraction form
    7,815.88/10,785.95 = 4,279.06/x
  3. Step 3: Cross multiply
    7,815.88x = 10,785.95 × 4,279.06
  4. Step 4: Simplify right side
    7,815.88x = 46,153,727.21
  5. Step 5: Solve for x
    x = 46,153,727.21/7,815.88
  6. Step 6: Final answer
    x = 5,905.12

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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.