Home / 9,381-12,945.90-5,189.16

Finding the Fourth Proportional to 9,381, 12,945.90 and 5,189.16

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Solution

The fourth proportional to 9,381, 12,945.90 and 5,189.16 is: 7,161.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,381 : 12,945.90 = 5,189.16 : x
  2. Step 2: Convert to fraction form
    9,381/12,945.90 = 5,189.16/x
  3. Step 3: Cross multiply
    9,381x = 12,945.90 × 5,189.16
  4. Step 4: Simplify right side
    9,381x = 67,178,346.44
  5. Step 5: Solve for x
    x = 67,178,346.44/9,381
  6. Step 6: Final answer
    x = 7,161.11

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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.