Home / 13,766.38-18,997.62-7,478.76

Finding the Fourth Proportional to 13,766.38, 18,997.62 and 7,478.76

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Solution

The fourth proportional to 13,766.38, 18,997.62 and 7,478.76 is: 10,320.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,766.38 : 18,997.62 = 7,478.76 : x
  2. Step 2: Convert to fraction form
    13,766.38/18,997.62 = 7,478.76/x
  3. Step 3: Cross multiply
    13,766.38x = 18,997.62 × 7,478.76
  4. Step 4: Simplify right side
    13,766.38x = 142,078,640.55
  5. Step 5: Solve for x
    x = 142,078,640.55/13,766.38
  6. Step 6: Final answer
    x = 10,320.70

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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.