Home / 21,172.25-29,215.61-12,222.64

Finding the Fourth Proportional to 21,172.25, 29,215.61 and 12,222.64

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Solution

The fourth proportional to 21,172.25, 29,215.61 and 12,222.64 is: 16,866.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.25 : 29,215.61 = 12,222.64 : x
  2. Step 2: Convert to fraction form
    21,172.25/29,215.61 = 12,222.64/x
  3. Step 3: Cross multiply
    21,172.25x = 29,215.61 × 12,222.64
  4. Step 4: Simplify right side
    21,172.25x = 357,091,822.30
  5. Step 5: Solve for x
    x = 357,091,822.30/21,172.25
  6. Step 6: Final answer
    x = 16,866.03

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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.