Home / 20,295.69-28,008.37-11,343.78

Finding the Fourth Proportional to 20,295.69, 28,008.37 and 11,343.78

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Solution

The fourth proportional to 20,295.69, 28,008.37 and 11,343.78 is: 15,654.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.69 : 28,008.37 = 11,343.78 : x
  2. Step 2: Convert to fraction form
    20,295.69/28,008.37 = 11,343.78/x
  3. Step 3: Cross multiply
    20,295.69x = 28,008.37 × 11,343.78
  4. Step 4: Simplify right side
    20,295.69x = 317,720,647.40
  5. Step 5: Solve for x
    x = 317,720,647.40/20,295.69
  6. Step 6: Final answer
    x = 15,654.59

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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.