Home / 21,010.08-28,995.16-11,578.64

Finding the Fourth Proportional to 21,010.08, 28,995.16 and 11,578.64

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Solution

The fourth proportional to 21,010.08, 28,995.16 and 11,578.64 is: 15,979.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.08 : 28,995.16 = 11,578.64 : x
  2. Step 2: Convert to fraction form
    21,010.08/28,995.16 = 11,578.64/x
  3. Step 3: Cross multiply
    21,010.08x = 28,995.16 × 11,578.64
  4. Step 4: Simplify right side
    21,010.08x = 335,724,519.38
  5. Step 5: Solve for x
    x = 335,724,519.38/21,010.08
  6. Step 6: Final answer
    x = 15,979.21

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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.