Home / 21,720.02-29,974.25-12,288.38

Finding the Fourth Proportional to 21,720.02, 29,974.25 and 12,288.38

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Solution

The fourth proportional to 21,720.02, 29,974.25 and 12,288.38 is: 16,958.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.02 : 29,974.25 = 12,288.38 : x
  2. Step 2: Convert to fraction form
    21,720.02/29,974.25 = 12,288.38/x
  3. Step 3: Cross multiply
    21,720.02x = 29,974.25 × 12,288.38
  4. Step 4: Simplify right side
    21,720.02x = 368,334,855.06
  5. Step 5: Solve for x
    x = 368,334,855.06/21,720.02
  6. Step 6: Final answer
    x = 16,958.31

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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.