Home / 12,642.18-18,963.28-3,408.18

Finding the Fourth Proportional to 12,642.18, 18,963.28 and 3,408.18

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Solution

The fourth proportional to 12,642.18, 18,963.28 and 3,408.18 is: 5,112.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,642.18 : 18,963.28 = 3,408.18 : x
  2. Step 2: Convert to fraction form
    12,642.18/18,963.28 = 3,408.18/x
  3. Step 3: Cross multiply
    12,642.18x = 18,963.28 × 3,408.18
  4. Step 4: Simplify right side
    12,642.18x = 64,630,271.63
  5. Step 5: Solve for x
    x = 64,630,271.63/12,642.18
  6. Step 6: Final answer
    x = 5,112.27

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Similar ratio
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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.