Home / 11,129.28-15,354.04-7,149.84

Finding the Fourth Proportional to 11,129.28, 15,354.04 and 7,149.84

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Solution

The fourth proportional to 11,129.28, 15,354.04 and 7,149.84 is: 9,863.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,129.28 : 15,354.04 = 7,149.84 : x
  2. Step 2: Convert to fraction form
    11,129.28/15,354.04 = 7,149.84/x
  3. Step 3: Cross multiply
    11,129.28x = 15,354.04 × 7,149.84
  4. Step 4: Simplify right side
    11,129.28x = 109,778,929.35
  5. Step 5: Solve for x
    x = 109,778,929.35/11,129.28
  6. Step 6: Final answer
    x = 9,863.97

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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.