Home / 20,827.05-28,741.10-11,395.50

Finding the Fourth Proportional to 20,827.05, 28,741.10 and 11,395.50

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Solution

The fourth proportional to 20,827.05, 28,741.10 and 11,395.50 is: 15,725.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.05 : 28,741.10 = 11,395.50 : x
  2. Step 2: Convert to fraction form
    20,827.05/28,741.10 = 11,395.50/x
  3. Step 3: Cross multiply
    20,827.05x = 28,741.10 × 11,395.50
  4. Step 4: Simplify right side
    20,827.05x = 327,519,148.07
  5. Step 5: Solve for x
    x = 327,519,148.07/20,827.05
  6. Step 6: Final answer
    x = 15,725.66

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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.