Home / 20,740.03-28,620.79-11,308.39

Finding the Fourth Proportional to 20,740.03, 28,620.79 and 11,308.39

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Solution

The fourth proportional to 20,740.03, 28,620.79 and 11,308.39 is: 15,605.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.03 : 28,620.79 = 11,308.39 : x
  2. Step 2: Convert to fraction form
    20,740.03/28,620.79 = 11,308.39/x
  3. Step 3: Cross multiply
    20,740.03x = 28,620.79 × 11,308.39
  4. Step 4: Simplify right side
    20,740.03x = 323,655,055.43
  5. Step 5: Solve for x
    x = 323,655,055.43/20,740.03
  6. Step 6: Final answer
    x = 15,605.33

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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.