Home / 21,008.16-28,992.60-11,577.60

Finding the Fourth Proportional to 21,008.16, 28,992.60 and 11,577.60

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Solution

The fourth proportional to 21,008.16, 28,992.60 and 11,577.60 is: 15,977.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.16 : 28,992.60 = 11,577.60 : x
  2. Step 2: Convert to fraction form
    21,008.16/28,992.60 = 11,577.60/x
  3. Step 3: Cross multiply
    21,008.16x = 28,992.60 × 11,577.60
  4. Step 4: Simplify right side
    21,008.16x = 335,664,725.76
  5. Step 5: Solve for x
    x = 335,664,725.76/21,008.16
  6. Step 6: Final answer
    x = 15,977.83

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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.