Home / 11,909.92-16,433.04-7,129.12

Finding the Fourth Proportional to 11,909.92, 16,433.04 and 7,129.12

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Solution

The fourth proportional to 11,909.92, 16,433.04 and 7,129.12 is: 9,836.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,909.92 : 16,433.04 = 7,129.12 : x
  2. Step 2: Convert to fraction form
    11,909.92/16,433.04 = 7,129.12/x
  3. Step 3: Cross multiply
    11,909.92x = 16,433.04 × 7,129.12
  4. Step 4: Simplify right side
    11,909.92x = 117,153,114.12
  5. Step 5: Solve for x
    x = 117,153,114.12/11,909.92
  6. Step 6: Final answer
    x = 9,836.60

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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.