Home / 12,642.60-18,962.42-5,622.78

Finding the Fourth Proportional to 12,642.60, 18,962.42 and 5,622.78

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Solution

The fourth proportional to 12,642.60, 18,962.42 and 5,622.78 is: 8,433.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,642.60 : 18,962.42 = 5,622.78 : x
  2. Step 2: Convert to fraction form
    12,642.60/18,962.42 = 5,622.78/x
  3. Step 3: Cross multiply
    12,642.60x = 18,962.42 × 5,622.78
  4. Step 4: Simplify right side
    12,642.60x = 106,621,487.81
  5. Step 5: Solve for x
    x = 106,621,487.81/12,642.60
  6. Step 6: Final answer
    x = 8,433.51

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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.