Home / 11,171.28-15,416.39-6,455.57

Finding the Fourth Proportional to 11,171.28, 15,416.39 and 6,455.57

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Solution

The fourth proportional to 11,171.28, 15,416.39 and 6,455.57 is: 8,908.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,171.28 : 15,416.39 = 6,455.57 : x
  2. Step 2: Convert to fraction form
    11,171.28/15,416.39 = 6,455.57/x
  3. Step 3: Cross multiply
    11,171.28x = 15,416.39 × 6,455.57
  4. Step 4: Simplify right side
    11,171.28x = 99,521,475.43
  5. Step 5: Solve for x
    x = 99,521,475.43/11,171.28
  6. Step 6: Final answer
    x = 8,908.69

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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.