Home / 20,355.42-28,089.99-11,403.30

Finding the Fourth Proportional to 20,355.42, 28,089.99 and 11,403.30

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Solution

The fourth proportional to 20,355.42, 28,089.99 and 11,403.30 is: 15,736.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,355.42 : 28,089.99 = 11,403.30 : x
  2. Step 2: Convert to fraction form
    20,355.42/28,089.99 = 11,403.30/x
  3. Step 3: Cross multiply
    20,355.42x = 28,089.99 × 11,403.30
  4. Step 4: Simplify right side
    20,355.42x = 320,318,582.97
  5. Step 5: Solve for x
    x = 320,318,582.97/20,355.42
  6. Step 6: Final answer
    x = 15,736.28

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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.