Home / 21,000.26-28,979.96-11,568.62

Finding the Fourth Proportional to 21,000.26, 28,979.96 and 11,568.62

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Solution

The fourth proportional to 21,000.26, 28,979.96 and 11,568.62 is: 15,964.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.26 : 28,979.96 = 11,568.62 : x
  2. Step 2: Convert to fraction form
    21,000.26/28,979.96 = 11,568.62/x
  3. Step 3: Cross multiply
    21,000.26x = 28,979.96 × 11,568.62
  4. Step 4: Simplify right side
    21,000.26x = 335,258,144.86
  5. Step 5: Solve for x
    x = 335,258,144.86/21,000.26
  6. Step 6: Final answer
    x = 15,964.48

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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.