Home / 8,658.20-11,946.75-5,121.20

Finding the Fourth Proportional to 8,658.20, 11,946.75 and 5,121.20

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Solution

The fourth proportional to 8,658.20, 11,946.75 and 5,121.20 is: 7,066.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.20 : 11,946.75 = 5,121.20 : x
  2. Step 2: Convert to fraction form
    8,658.20/11,946.75 = 5,121.20/x
  3. Step 3: Cross multiply
    8,658.20x = 11,946.75 × 5,121.20
  4. Step 4: Simplify right side
    8,658.20x = 61,181,696.10
  5. Step 5: Solve for x
    x = 61,181,696.10/8,658.20
  6. Step 6: Final answer
    x = 7,066.33

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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.