Home / 15,691.37-21,652.81-8,617.79

Finding the Fourth Proportional to 15,691.37, 21,652.81 and 8,617.79

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Solution

The fourth proportional to 15,691.37, 21,652.81 and 8,617.79 is: 11,891.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,691.37 : 21,652.81 = 8,617.79 : x
  2. Step 2: Convert to fraction form
    15,691.37/21,652.81 = 8,617.79/x
  3. Step 3: Cross multiply
    15,691.37x = 21,652.81 × 8,617.79
  4. Step 4: Simplify right side
    15,691.37x = 186,599,369.49
  5. Step 5: Solve for x
    x = 186,599,369.49/15,691.37
  6. Step 6: Final answer
    x = 11,891.85

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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.