Home / 21,054.56-29,055.83-11,979.42

Finding the Fourth Proportional to 21,054.56, 29,055.83 and 11,979.42

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Solution

The fourth proportional to 21,054.56, 29,055.83 and 11,979.42 is: 16,531.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,054.56 : 29,055.83 = 11,979.42 : x
  2. Step 2: Convert to fraction form
    21,054.56/29,055.83 = 11,979.42/x
  3. Step 3: Cross multiply
    21,054.56x = 29,055.83 × 11,979.42
  4. Step 4: Simplify right side
    21,054.56x = 348,072,040.08
  5. Step 5: Solve for x
    x = 348,072,040.08/21,054.56
  6. Step 6: Final answer
    x = 16,531.91

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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.