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Finding the Fourth Proportional to 8,448.36, 12,658.86 and 5,151.48

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Solution

The fourth proportional to 8,448.36, 12,658.86 and 5,151.48 is: 7,718.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,448.36 : 12,658.86 = 5,151.48 : x
  2. Step 2: Convert to fraction form
    8,448.36/12,658.86 = 5,151.48/x
  3. Step 3: Cross multiply
    8,448.36x = 12,658.86 × 5,151.48
  4. Step 4: Simplify right side
    8,448.36x = 65,211,864.11
  5. Step 5: Solve for x
    x = 65,211,864.11/8,448.36
  6. Step 6: Final answer
    x = 7,718.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.