Home / 21,008.62-28,991.91-11,577.16

Finding the Fourth Proportional to 21,008.62, 28,991.91 and 11,577.16

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Solution

The fourth proportional to 21,008.62, 28,991.91 and 11,577.16 is: 15,976.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.62 : 28,991.91 = 11,577.16 : x
  2. Step 2: Convert to fraction form
    21,008.62/28,991.91 = 11,577.16/x
  3. Step 3: Cross multiply
    21,008.62x = 28,991.91 × 11,577.16
  4. Step 4: Simplify right side
    21,008.62x = 335,643,980.78
  5. Step 5: Solve for x
    x = 335,643,980.78/21,008.62
  6. Step 6: Final answer
    x = 15,976.49

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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.