Home / 21,007.08-28,991.06-11,575.64

Finding the Fourth Proportional to 21,007.08, 28,991.06 and 11,575.64

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Solution

The fourth proportional to 21,007.08, 28,991.06 and 11,575.64 is: 15,975.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.08 : 28,991.06 = 11,575.64 : x
  2. Step 2: Convert to fraction form
    21,007.08/28,991.06 = 11,575.64/x
  3. Step 3: Cross multiply
    21,007.08x = 28,991.06 × 11,575.64
  4. Step 4: Simplify right side
    21,007.08x = 335,590,073.78
  5. Step 5: Solve for x
    x = 335,590,073.78/21,007.08
  6. Step 6: Final answer
    x = 15,975.09

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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.