Home / 8,658.16-11,947.38-5,120.68

Finding the Fourth Proportional to 8,658.16, 11,947.38 and 5,120.68

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Solution

The fourth proportional to 8,658.16, 11,947.38 and 5,120.68 is: 7,066.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.16 : 11,947.38 = 5,120.68 : x
  2. Step 2: Convert to fraction form
    8,658.16/11,947.38 = 5,120.68/x
  3. Step 3: Cross multiply
    8,658.16x = 11,947.38 × 5,120.68
  4. Step 4: Simplify right side
    8,658.16x = 61,178,709.82
  5. Step 5: Solve for x
    x = 61,178,709.82/8,658.16
  6. Step 6: Final answer
    x = 7,066.02

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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.