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Finding the Fourth Proportional to 8,630.08, 11,904.84 and 7,129.12

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Solution

The fourth proportional to 8,630.08, 11,904.84 and 7,129.12 is: 9,834.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,630.08 : 11,904.84 = 7,129.12 : x
  2. Step 2: Convert to fraction form
    8,630.08/11,904.84 = 7,129.12/x
  3. Step 3: Cross multiply
    8,630.08x = 11,904.84 × 7,129.12
  4. Step 4: Simplify right side
    8,630.08x = 84,871,032.94
  5. Step 5: Solve for x
    x = 84,871,032.94/8,630.08
  6. Step 6: Final answer
    x = 9,834.33

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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.