Home / 20,435.84-28,190.87-13,723.37

Finding the Fourth Proportional to 20,435.84, 28,190.87 and 13,723.37

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Solution

The fourth proportional to 20,435.84, 28,190.87 and 13,723.37 is: 18,931.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,435.84 : 28,190.87 = 13,723.37 : x
  2. Step 2: Convert to fraction form
    20,435.84/28,190.87 = 13,723.37/x
  3. Step 3: Cross multiply
    20,435.84x = 28,190.87 × 13,723.37
  4. Step 4: Simplify right side
    20,435.84x = 386,873,739.63
  5. Step 5: Solve for x
    x = 386,873,739.63/20,435.84
  6. Step 6: Final answer
    x = 18,931.14

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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.