Home / 21,475.23-29,629.76-13,921.89

Finding the Fourth Proportional to 21,475.23, 29,629.76 and 13,921.89

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Solution

The fourth proportional to 21,475.23, 29,629.76 and 13,921.89 is: 19,208.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,475.23 : 29,629.76 = 13,921.89 : x
  2. Step 2: Convert to fraction form
    21,475.23/29,629.76 = 13,921.89/x
  3. Step 3: Cross multiply
    21,475.23x = 29,629.76 × 13,921.89
  4. Step 4: Simplify right side
    21,475.23x = 412,502,189.84
  5. Step 5: Solve for x
    x = 412,502,189.84/21,475.23
  6. Step 6: Final answer
    x = 19,208.28

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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.