Home / 20,864.40-28,783.21-18,476.80

Finding the Fourth Proportional to 20,864.40, 28,783.21 and 18,476.80

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Solution

The fourth proportional to 20,864.40, 28,783.21 and 18,476.80 is: 25,489.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.40 : 28,783.21 = 18,476.80 : x
  2. Step 2: Convert to fraction form
    20,864.40/28,783.21 = 18,476.80/x
  3. Step 3: Cross multiply
    20,864.40x = 28,783.21 × 18,476.80
  4. Step 4: Simplify right side
    20,864.40x = 531,821,614.53
  5. Step 5: Solve for x
    x = 531,821,614.53/20,864.40
  6. Step 6: Final answer
    x = 25,489.43

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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.