Home / 12,261.16-18,390.68-7,581.89

Finding the Fourth Proportional to 12,261.16, 18,390.68 and 7,581.89

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Solution

The fourth proportional to 12,261.16, 18,390.68 and 7,581.89 is: 11,372.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,261.16 : 18,390.68 = 7,581.89 : x
  2. Step 2: Convert to fraction form
    12,261.16/18,390.68 = 7,581.89/x
  3. Step 3: Cross multiply
    12,261.16x = 18,390.68 × 7,581.89
  4. Step 4: Simplify right side
    12,261.16x = 139,436,112.79
  5. Step 5: Solve for x
    x = 139,436,112.79/12,261.16
  6. Step 6: Final answer
    x = 11,372.18

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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.