Home / 20,758.64-31,137.88-12,441.16

Finding the Fourth Proportional to 20,758.64, 31,137.88 and 12,441.16

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Solution

The fourth proportional to 20,758.64, 31,137.88 and 12,441.16 is: 18,661.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.64 : 31,137.88 = 12,441.16 : x
  2. Step 2: Convert to fraction form
    20,758.64/31,137.88 = 12,441.16/x
  3. Step 3: Cross multiply
    20,758.64x = 31,137.88 × 12,441.16
  4. Step 4: Simplify right side
    20,758.64x = 387,391,347.14
  5. Step 5: Solve for x
    x = 387,391,347.14/20,758.64
  6. Step 6: Final answer
    x = 18,661.69

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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.