Home / 12,640.20-18,965.70-5,246.28

Finding the Fourth Proportional to 12,640.20, 18,965.70 and 5,246.28

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Solution

The fourth proportional to 12,640.20, 18,965.70 and 5,246.28 is: 7,871.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.20 : 18,965.70 = 5,246.28 : x
  2. Step 2: Convert to fraction form
    12,640.20/18,965.70 = 5,246.28/x
  3. Step 3: Cross multiply
    12,640.20x = 18,965.70 × 5,246.28
  4. Step 4: Simplify right side
    12,640.20x = 99,499,372.60
  5. Step 5: Solve for x
    x = 99,499,372.60/12,640.20
  6. Step 6: Final answer
    x = 7,871.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.