Home / 20,369.97-28,108.08-11,415.56

Finding the Fourth Proportional to 20,369.97, 28,108.08 and 11,415.56

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Solution

The fourth proportional to 20,369.97, 28,108.08 and 11,415.56 is: 15,752.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,369.97 : 28,108.08 = 11,415.56 : x
  2. Step 2: Convert to fraction form
    20,369.97/28,108.08 = 11,415.56/x
  3. Step 3: Cross multiply
    20,369.97x = 28,108.08 × 11,415.56
  4. Step 4: Simplify right side
    20,369.97x = 320,869,333.18
  5. Step 5: Solve for x
    x = 320,869,333.18/20,369.97
  6. Step 6: Final answer
    x = 15,752.08

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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.