Home / 21,181.97-29,218.98-13,210.36

Finding the Fourth Proportional to 21,181.97, 29,218.98 and 13,210.36

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Solution

The fourth proportional to 21,181.97, 29,218.98 and 13,210.36 is: 18,222.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.97 : 29,218.98 = 13,210.36 : x
  2. Step 2: Convert to fraction form
    21,181.97/29,218.98 = 13,210.36/x
  3. Step 3: Cross multiply
    21,181.97x = 29,218.98 × 13,210.36
  4. Step 4: Simplify right side
    21,181.97x = 385,993,146.82
  5. Step 5: Solve for x
    x = 385,993,146.82/21,181.97
  6. Step 6: Final answer
    x = 18,222.72

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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.