Home / 21,399.72-29,533.16-11,971.32

Finding the Fourth Proportional to 21,399.72, 29,533.16 and 11,971.32

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Solution

The fourth proportional to 21,399.72, 29,533.16 and 11,971.32 is: 16,521.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,399.72 : 29,533.16 = 11,971.32 : x
  2. Step 2: Convert to fraction form
    21,399.72/29,533.16 = 11,971.32/x
  3. Step 3: Cross multiply
    21,399.72x = 29,533.16 × 11,971.32
  4. Step 4: Simplify right side
    21,399.72x = 353,550,908.97
  5. Step 5: Solve for x
    x = 353,550,908.97/21,399.72
  6. Step 6: Final answer
    x = 16,521.29

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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.