Home / 20,731.36-28,609.04-11,300

Finding the Fourth Proportional to 20,731.36, 28,609.04 and 11,300

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Solution

The fourth proportional to 20,731.36, 28,609.04 and 11,300 is: 15,593.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.36 : 28,609.04 = 11,300 : x
  2. Step 2: Convert to fraction form
    20,731.36/28,609.04 = 11,300/x
  3. Step 3: Cross multiply
    20,731.36x = 28,609.04 × 11,300
  4. Step 4: Simplify right side
    20,731.36x = 323,282,152
  5. Step 5: Solve for x
    x = 323,282,152/20,731.36
  6. Step 6: Final answer
    x = 15,593.87

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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.