Home / 20,992.02-28,944.99-15,677.88

Finding the Fourth Proportional to 20,992.02, 28,944.99 and 15,677.88

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Solution

The fourth proportional to 20,992.02, 28,944.99 and 15,677.88 is: 21,617.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.02 : 28,944.99 = 15,677.88 : x
  2. Step 2: Convert to fraction form
    20,992.02/28,944.99 = 15,677.88/x
  3. Step 3: Cross multiply
    20,992.02x = 28,944.99 × 15,677.88
  4. Step 4: Simplify right side
    20,992.02x = 453,796,079.82
  5. Step 5: Solve for x
    x = 453,796,079.82/20,992.02
  6. Step 6: Final answer
    x = 21,617.55

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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.