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Finding the Fourth Proportional to 8,906.04, 12,288.06 and 5,130.24

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Solution

The fourth proportional to 8,906.04, 12,288.06 and 5,130.24 is: 7,078.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,906.04 : 12,288.06 = 5,130.24 : x
  2. Step 2: Convert to fraction form
    8,906.04/12,288.06 = 5,130.24/x
  3. Step 3: Cross multiply
    8,906.04x = 12,288.06 × 5,130.24
  4. Step 4: Simplify right side
    8,906.04x = 63,040,696.93
  5. Step 5: Solve for x
    x = 63,040,696.93/8,906.04
  6. Step 6: Final answer
    x = 7,078.42

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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.