Home / 20,355.55-28,090.66-11,403.05

Finding the Fourth Proportional to 20,355.55, 28,090.66 and 11,403.05

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Solution

The fourth proportional to 20,355.55, 28,090.66 and 11,403.05 is: 15,736.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,355.55 : 28,090.66 = 11,403.05 : x
  2. Step 2: Convert to fraction form
    20,355.55/28,090.66 = 11,403.05/x
  3. Step 3: Cross multiply
    20,355.55x = 28,090.66 × 11,403.05
  4. Step 4: Simplify right side
    20,355.55x = 320,319,003.04
  5. Step 5: Solve for x
    x = 320,319,003.04/20,355.55
  6. Step 6: Final answer
    x = 15,736.20

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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.