Home / 21,008.08-28,992.40-11,576.64

Finding the Fourth Proportional to 21,008.08, 28,992.40 and 11,576.64

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Solution

The fourth proportional to 21,008.08, 28,992.40 and 11,576.64 is: 15,976.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.08 : 28,992.40 = 11,576.64 : x
  2. Step 2: Convert to fraction form
    21,008.08/28,992.40 = 11,576.64/x
  3. Step 3: Cross multiply
    21,008.08x = 28,992.40 × 11,576.64
  4. Step 4: Simplify right side
    21,008.08x = 335,634,577.54
  5. Step 5: Solve for x
    x = 335,634,577.54/21,008.08
  6. Step 6: Final answer
    x = 15,976.45

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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.