Home / 20,982.81-28,953.03-13,435.83

Finding the Fourth Proportional to 20,982.81, 28,953.03 and 13,435.83

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Solution

The fourth proportional to 20,982.81, 28,953.03 and 13,435.83 is: 18,539.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.81 : 28,953.03 = 13,435.83 : x
  2. Step 2: Convert to fraction form
    20,982.81/28,953.03 = 13,435.83/x
  3. Step 3: Cross multiply
    20,982.81x = 28,953.03 × 13,435.83
  4. Step 4: Simplify right side
    20,982.81x = 389,007,989.06
  5. Step 5: Solve for x
    x = 389,007,989.06/20,982.81
  6. Step 6: Final answer
    x = 18,539.37

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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.