Home / 20,355.68-28,090.50-11,403.12

Finding the Fourth Proportional to 20,355.68, 28,090.50 and 11,403.12

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Solution

The fourth proportional to 20,355.68, 28,090.50 and 11,403.12 is: 15,736.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,355.68 : 28,090.50 = 11,403.12 : x
  2. Step 2: Convert to fraction form
    20,355.68/28,090.50 = 11,403.12/x
  3. Step 3: Cross multiply
    20,355.68x = 28,090.50 × 11,403.12
  4. Step 4: Simplify right side
    20,355.68x = 320,319,342.36
  5. Step 5: Solve for x
    x = 320,319,342.36/20,355.68
  6. Step 6: Final answer
    x = 15,736.12

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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.