Home / 21,112.10-29,144.16-13,458.68

Finding the Fourth Proportional to 21,112.10, 29,144.16 and 13,458.68

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Solution

The fourth proportional to 21,112.10, 29,144.16 and 13,458.68 is: 18,579.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.10 : 29,144.16 = 13,458.68 : x
  2. Step 2: Convert to fraction form
    21,112.10/29,144.16 = 13,458.68/x
  3. Step 3: Cross multiply
    21,112.10x = 29,144.16 × 13,458.68
  4. Step 4: Simplify right side
    21,112.10x = 392,241,923.31
  5. Step 5: Solve for x
    x = 392,241,923.31/21,112.10
  6. Step 6: Final answer
    x = 18,579.01

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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.