Home / 21,218.08-29,208.72-20,112.16

Finding the Fourth Proportional to 21,218.08, 29,208.72 and 20,112.16

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Solution

The fourth proportional to 21,218.08, 29,208.72 and 20,112.16 is: 27,686.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.08 : 29,208.72 = 20,112.16 : x
  2. Step 2: Convert to fraction form
    21,218.08/29,208.72 = 20,112.16/x
  3. Step 3: Cross multiply
    21,218.08x = 29,208.72 × 20,112.16
  4. Step 4: Simplify right side
    21,218.08x = 587,450,450.04
  5. Step 5: Solve for x
    x = 587,450,450.04/21,218.08
  6. Step 6: Final answer
    x = 27,686.32

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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.