Home / 11,391.72-15,720.12-6,356.16

Finding the Fourth Proportional to 11,391.72, 15,720.12 and 6,356.16

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Solution

The fourth proportional to 11,391.72, 15,720.12 and 6,356.16 is: 8,771.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,391.72 : 15,720.12 = 6,356.16 : x
  2. Step 2: Convert to fraction form
    11,391.72/15,720.12 = 6,356.16/x
  3. Step 3: Cross multiply
    11,391.72x = 15,720.12 × 6,356.16
  4. Step 4: Simplify right side
    11,391.72x = 99,919,597.94
  5. Step 5: Solve for x
    x = 99,919,597.94/11,391.72
  6. Step 6: Final answer
    x = 8,771.25

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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.