Home / 11,145.75-15,384.78-8,011.05

Finding the Fourth Proportional to 11,145.75, 15,384.78 and 8,011.05

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Solution

The fourth proportional to 11,145.75, 15,384.78 and 8,011.05 is: 11,057.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,145.75 : 15,384.78 = 8,011.05 : x
  2. Step 2: Convert to fraction form
    11,145.75/15,384.78 = 8,011.05/x
  3. Step 3: Cross multiply
    11,145.75x = 15,384.78 × 8,011.05
  4. Step 4: Simplify right side
    11,145.75x = 123,248,241.82
  5. Step 5: Solve for x
    x = 123,248,241.82/11,145.75
  6. Step 6: Final answer
    x = 11,057.87

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Half scale
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Double scale
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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.