Home / 13,057.38-18,014.76-8,580.78

Finding the Fourth Proportional to 13,057.38, 18,014.76 and 8,580.78

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Solution

The fourth proportional to 13,057.38, 18,014.76 and 8,580.78 is: 11,838.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,057.38 : 18,014.76 = 8,580.78 : x
  2. Step 2: Convert to fraction form
    13,057.38/18,014.76 = 8,580.78/x
  3. Step 3: Cross multiply
    13,057.38x = 18,014.76 × 8,580.78
  4. Step 4: Simplify right side
    13,057.38x = 154,580,692.31
  5. Step 5: Solve for x
    x = 154,580,692.31/13,057.38
  6. Step 6: Final answer
    x = 11,838.57

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Half scale
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Double scale
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Similar ratio
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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.