Home / 21,265.16-31,899.99-8,786.12

Finding the Fourth Proportional to 21,265.16, 31,899.99 and 8,786.12

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Solution

The fourth proportional to 21,265.16, 31,899.99 and 8,786.12 is: 13,180.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,265.16 : 31,899.99 = 8,786.12 : x
  2. Step 2: Convert to fraction form
    21,265.16/31,899.99 = 8,786.12/x
  3. Step 3: Cross multiply
    21,265.16x = 31,899.99 × 8,786.12
  4. Step 4: Simplify right side
    21,265.16x = 280,277,140.14
  5. Step 5: Solve for x
    x = 280,277,140.14/21,265.16
  6. Step 6: Final answer
    x = 13,180.11

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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.