Home / 21,009.72-28,993.32-11,450.16

Finding the Fourth Proportional to 21,009.72, 28,993.32 and 11,450.16

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Solution

The fourth proportional to 21,009.72, 28,993.32 and 11,450.16 is: 15,801.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.72 : 28,993.32 = 11,450.16 : x
  2. Step 2: Convert to fraction form
    21,009.72/28,993.32 = 11,450.16/x
  3. Step 3: Cross multiply
    21,009.72x = 28,993.32 × 11,450.16
  4. Step 4: Simplify right side
    21,009.72x = 331,978,152.93
  5. Step 5: Solve for x
    x = 331,978,152.93/21,009.72
  6. Step 6: Final answer
    x = 15,801.17

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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.