Home / 11,145.14-15,380.28-6,429.42

Finding the Fourth Proportional to 11,145.14, 15,380.28 and 6,429.42

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Solution

The fourth proportional to 11,145.14, 15,380.28 and 6,429.42 is: 8,872.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,145.14 : 15,380.28 = 6,429.42 : x
  2. Step 2: Convert to fraction form
    11,145.14/15,380.28 = 6,429.42/x
  3. Step 3: Cross multiply
    11,145.14x = 15,380.28 × 6,429.42
  4. Step 4: Simplify right side
    11,145.14x = 98,886,279.84
  5. Step 5: Solve for x
    x = 98,886,279.84/11,145.14
  6. Step 6: Final answer
    x = 8,872.60

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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.