Home / 8,120.16-11,206.08-4,979.52

Finding the Fourth Proportional to 8,120.16, 11,206.08 and 4,979.52

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Solution

The fourth proportional to 8,120.16, 11,206.08 and 4,979.52 is: 6,871.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.16 : 11,206.08 = 4,979.52 : x
  2. Step 2: Convert to fraction form
    8,120.16/11,206.08 = 4,979.52/x
  3. Step 3: Cross multiply
    8,120.16x = 11,206.08 × 4,979.52
  4. Step 4: Simplify right side
    8,120.16x = 55,800,899.48
  5. Step 5: Solve for x
    x = 55,800,899.48/8,120.16
  6. Step 6: Final answer
    x = 6,871.90

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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.