Home / 13,281.78-18,331.97-7,616.42

Finding the Fourth Proportional to 13,281.78, 18,331.97 and 7,616.42

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Solution

The fourth proportional to 13,281.78, 18,331.97 and 7,616.42 is: 10,512.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.78 : 18,331.97 = 7,616.42 : x
  2. Step 2: Convert to fraction form
    13,281.78/18,331.97 = 7,616.42/x
  3. Step 3: Cross multiply
    13,281.78x = 18,331.97 × 7,616.42
  4. Step 4: Simplify right side
    13,281.78x = 139,623,853.21
  5. Step 5: Solve for x
    x = 139,623,853.21/13,281.78
  6. Step 6: Final answer
    x = 10,512.44

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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.