Home / 21,103.25-31,643.18-8,632.03

Finding the Fourth Proportional to 21,103.25, 31,643.18 and 8,632.03

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Solution

The fourth proportional to 21,103.25, 31,643.18 and 8,632.03 is: 12,943.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.25 : 31,643.18 = 8,632.03 : x
  2. Step 2: Convert to fraction form
    21,103.25/31,643.18 = 8,632.03/x
  3. Step 3: Cross multiply
    21,103.25x = 31,643.18 × 8,632.03
  4. Step 4: Simplify right side
    21,103.25x = 273,144,720.84
  5. Step 5: Solve for x
    x = 273,144,720.84/21,103.25
  6. Step 6: Final answer
    x = 12,943.26

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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.