Home / 12,420.12-17,146.11-9,581.12

Finding the Fourth Proportional to 12,420.12, 17,146.11 and 9,581.12

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Solution

The fourth proportional to 12,420.12, 17,146.11 and 9,581.12 is: 13,226.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.12 : 17,146.11 = 9,581.12 : x
  2. Step 2: Convert to fraction form
    12,420.12/17,146.11 = 9,581.12/x
  3. Step 3: Cross multiply
    12,420.12x = 17,146.11 × 9,581.12
  4. Step 4: Simplify right side
    12,420.12x = 164,278,937.44
  5. Step 5: Solve for x
    x = 164,278,937.44/12,420.12
  6. Step 6: Final answer
    x = 13,226.84

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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.